The Trigonometric ratios are:
P/H = Sinθ
B/H = Cosθ
P/B = Tanθ
H/P = Cosecθ
H/B = Secθ
B/P = Cotθ
Where,
'P' represents the perpendicular
'B' represents the base
'H' = represents the hypotenuse
P/H = Sinθ
B/H = Cosθ
P/B = Tanθ
A. As the values of p, b or h are not given.
Pythagoras Theorem states that:
h² = p² + b² or h = [tex]\sqrt{p^2 + b^2}[/tex]
Altitude of a triangle is usually given by the perpendicular,
So,
h² = p² + b²
h² - b² = p²
p² = h² - b²
p = [tex]\sqrt{h^2 - b^2}[/tex]
B. The trigonometric ratios for θ = 60°
Sin 60 = √3/2
Cos 60 = 1/2
Tan 60 = √3
C. The trigonometric ratios for θ = 30°
Sin 30 = 1/2
Cos 30 = √3/2
Tan 30 = 1/√3
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Margret has $32.00 in a savings account. Margret wants to have a balance of $40.00 in the account. How much money does Margret need to deposit to reach this amount?
The amount of money that Margret needs to deposit to reach this amount is $8.
What is an expression?Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations.
Since Margret has $32.00 in a savings account. Margret wants to have a balance of $40.00 in the account, the amount needed will be:
= $40 - $32
= $8
She'll need $8 more.
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Solve it please I need this asap!
The angles ∠BCD and ∠BAD are opposite interior angles of a parallelogram. in which the alternate interior angles ∠BAC and ∠ACD and ∠BCA and ∠DAC are congruent, from which by angle addition property, ∠BCD ≅ ∠BAD
What are alternate interior angles?Alternate interior angles are angles formed by the transversal to two parallel lines on the inside of the parallel lines, and on opposite sides of the transversal.
The two column-method used to prove that ∠BCA is congruent to ∠DAC can be presented as follows;
Step [tex]{}[/tex] Statement Reason
1. [tex]\overline{BC}[/tex]║ [tex]\overline{AD}[/tex], [tex]\overline{AB}[/tex]║[tex]\overline{CD}[/tex] [tex]{}[/tex] Given
2. [tex]{}[/tex] ∠BCA ≅ ∠DAC ║ lines cut by a trans. form ≅ int. ∠s
3. [tex]{}[/tex] [tex]\overline{AC}[/tex]║[tex]\overline{CA}[/tex] [tex]{}[/tex] Reflexive Property
4. ∠BAC ≅ ∠ACD [tex]{}[/tex] Alternate interion angles
5. ∠BCA = ∠DAC[tex]{}[/tex] Definition of congruency
[tex]{}[/tex] ∠BAC = ∠ACD
6. ∠BCD = ∠BCA + ∠ACD[tex]{}[/tex] Angle addition property
∠BAD = ∠BAC + ∠DAC
7. ∠BCD = ∠BCA + ∠ACD [tex]{}[/tex] Substitution property
8. [tex]{}[/tex] ∠BCD = ∠BAD [tex]{}[/tex] Substitution property
9. ∠BCD ≅ ∠BAD [tex]{}[/tex] Definition of congruency
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Find the exact value of sin(u + v) given that sinu = 5/3 and cos v =-4/5. (Both u and v are in Quadrant I.)
The exact value of sin(u + v), obtained using trigonometric identities is for sine and cosine is 16/65
What are trigonometric identities?Trigonometric identities are equations that involve trigonometric functions that are valid for all values of the input variable.
The possible value of sin(u) obtained from a similar question posted online is; sin(u) = 5/13
Both u and v are in quadrant II
The trigonometric identity of the addition formula for the sine of the sum of two angles, indicates;
sin(u + v) = sin(u)·cos(v) + sin(v)·cos(u)
sin(u) = 5/13
cos(v) = -4/5
sin(v) = √(1 - (cos(v))²)
Therefore;
sin(v) = √(1 - (-4/5)²) = 3/5
cos(u) = √(1 - (sin(v))²)
Therefore;
cos(u) = √(1 - (5/13)²) = 12/13
Therefore;
sin(u + v) = (5/13) × (-4/5) + (3/5) × (12/13) = 16/65
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(pythagorean theorem mc) a right triangle has a leg length of square root of 11 and a hypotenuse length of 9. determine the length of the other leg of the right triangle. square root of 18 square root of 81 square root of 70 22
The length of the other leg of the given right triangle is [tex]\sqrt{70}[/tex].
RIGHT TRIANGLE
A triangle is classified as a right triangle when it presents one of your angles equal to 90º. The greatest side of a right triangle is called the hypotenuse. And, the other two sides are called legs.
The math tools applied for finding angles or sides in a right triangle are the trigonometric ratios or the Pythagorean Theorem.
The Pythagorean Theorem says (hypotenuse)²= (leg1)²+(leg2)². And the main trigonometric ratios are: sin (x) , cos (x) and tan (x) .
The question gives:
leg1=[tex]\sqrt{11}[/tex]hypotenuse = 9Therefore, from the Pythagorean Theorem, you will find the value of the other leg. See below.
[tex]9^2={\sqrt{11}^2 +{leg_2}^2[/tex]
[tex]81=11 +{leg_2}^2[/tex]
[tex]{leg_2}^2=81-11\\ \\ {leg_2}^2=70\\ \\ leg_2=\sqrt{70}[/tex]
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review the video to determine whether each statement about the following equation is true or false. dndt
The statemet 2, the variable K represent carrying capacity and the variable N represent population size, is correct.
In the given question we have to review the video to determine whether each statement about the following equation is true or false.
The given equation is:
[tex]\frac{dN}{dt}=rN(\frac{K-N}{K})[/tex]
The given equation is used to find the annual growth of population.
In which, dN/dt = the annual increase for the population,
r = the annual growth rate,
N = the population size, and
K = the carrying capacity.
So the statemet two, the variable K represent carrying capacity and the variable N represent population size, is correct.
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Find the maximum profit and the number of units that must be produced and sold in order to yield the maximum profit. Assume that revenue, Upper R left parenthesis x right parenthesis, andcost, Upper C left parenthesis x right parenthesis, of producing x units are in dollars. R(x)=3x, C(x)=0.05x^2+0.04x+10
To maximize the profit 29.6 units must be produced.
What is the maxima or minima?
The maxima and minima of a function collectively referred to as extrema in mathematical analysis, are the highest and lowest values of the function, either on the whole domain or within a specific range.
We have given,
The revenue function is,
R(x)=3x
Cost function,
C(x)=0.05x^2+0.04x+10,
Where
x = number of units produced.
Thus, profit = revenue - cost
P(x) = 3x - (0.05x^2+0.04x+10)
= -0.05x^2 + 2.96x - 10
Differentiating with respect to x,
P'(x) = -0.1x + 2.96
Again differentiating with respect to x,
P''(x) = -0.1
For maxima or minima,
P'(x) = 0,
0 = -0.1x + 2.96
-0.1x = -2.96
x = 2.96/0.1
For x = 29.6,
P''(x) = negative,
Hence, to maximize the profit 29.6 units must be produced.
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Each hamburger patty is 1/8 pound. Drag the correct equation to each amount to show how many 1/8 pound hamburger patties can be made.
Answer:
3 pounds:
3 ÷ [tex]\frac{1}{8}[/tex] = 24
7 pounds:
7÷[tex]\frac{1}{8}[/tex] = 56
Step-by-step explanation:
3÷[tex]\frac{1}{8}[/tex] = [tex]\frac{3}{1}[/tex] x [tex]\frac{8}{1}[/tex] = [tex]\frac{24}{1}[/tex] = 24
If it takes 1/8 of a pound to make 1 hamburger. Then it would take 1 pound to make 8 hamburgers.
3 x 8 = 24
7x8 = 56
and D are noncoplanar. △ABC,△ABC,△ACD, and △ABD are equilateral. X and Y are midpoints of AC¯¯¯¯¯¯¯¯ and and AD.Z is a point on AB¯¯¯¯¯¯¯¯. What kind of triangle is △XYZ? Explain.
ΔXYZ will also be an equilateral triangle.
What is equilateral triangle?
An equilateral triangle in geometry is a triangle with equal-length sides on all three sides. In the well-known Euclidean space, an equilateral triangle also is equiangular, meaning that each of its three internal angles is 60 degrees and congruent with the others. It's also referred to it as a regular triangle because it is a regular polygon.
As X,Y,Z are the midpoints of sides of equilateral triangle so when we will join the X,Y,Z we will find that distances XY=YZ=XZ are three are equal because this is proved by similarity of triangles which in itself is a detailed and vast topic
Hence XYZ will also be an equilateral triangle
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Not sure if I did this right, I'm given a line to plot it on
zeroes are 2,-2,
vertical asymptotes are -1,3
plotted on the number line
---------|---------|---------|---------|---------|---------|
-2 -1 0 1 2 3
What is vertical asymptote?
A vertical asymptote is a line that appears to correspond with a function's graph but never really touches the curve. When graphing a function, the vertical asymptote of the function is crucial.
The curve is neither touched or crossed by a vertical asymptote, which is a vertical line along which the function becomes unbounded (either y tends to or -). K is NOT present in the domain of the function if x = k is the vertical asymptote of a function y = f(x). Any quantity of vertical asymptotes is possible for a function. i.e., it may have 0 vertical asymptote, 1, 2,..., or a limitless amount. If the y-axis represents the vertical asymptote, we often do not portray it by a dotted line. Instead, we represent a vertical asymptote by a vertical dotted line.
1)
zeros means that the value were g(x) is zero
that means (x-2) and (x+2) = 0
x = 2 ,-2
2)
for vertical asymptote (x+1)and (x-3) = 0
x = -1,3
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Consider all right circular cylinders for which the sum of the height and circumference is 60 cm. What is the radius of the one with maximum volume?.
By using the concept of maxima, it can be calculated that
Volume is maximum if the radius of the cone is 40 cm
What is maxima of a function?
Maxima of a function gives the maximum value of the function on a certain interval or on the whole domain.
Let the height of the cylinder be h and radius be r
Sum of height and circumference = h + 2πr
By the problem,
h + 2πr = 60
h = 60 -2πr
Volume(V) = π[tex]r^2[/tex] h
= π[tex]r^2[/tex](60 - r)
= 60π[tex]r^2[/tex] - π[tex]r^3[/tex]
[tex]\frac{dV}{dr} = 120\pi r - 3 \pi r^2[/tex]
For maximum volume
[tex]\frac{dV}{dr} = 0[/tex]
[tex]120\pi r - 3 \pi r^2 = 0\\[/tex]
[tex]3 r^2 = 120 r\\3r = 120 [r \neq 0]\\r = \frac{120}{3}\\r = 40 \ cm[/tex]
[tex]\frac{d^2V}{dr^2} = 120 \pi - 6 \pi r\\[/tex]
Putting r = 40
[tex]\frac{d^2V}{dr^2} = 120 \pi - 6 \pi \times 40\\\frac{d^2V}{dr^2} =120\pi - 240 \pi\\\frac{d^2V}{dr^2} = -120\pi < 0[/tex]
Hence Volume is maximum
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A car corporation produced 940
fewer cars this month than last.
Write a signed number to represent this month's change in production
The signed number to represent ''A car corporation produced 940 fewer cars this month than last'' is - 940.
What is meant by signed number representations ?Negative integers in binary number systems must be encoded in computation using signed number representations.In mathematics, negative integers in any base are denoted by a minus sign ("-") before them. However, numbers are solely represented as bit sequences, without any additional symbols, in RAM or CPU registers. The four most popular ways to express signed integers using the binary numeral system are offset binary, ones' complement, two's complement, and sign-magnitude. Some of the other techniques, such negative binary with the base 2, employ implicit signs rather than explicit ones. For different bases, whether positive, negative, fractional, or other elaborations on such themes, corresponding algorithms can be developed.Learn more about signed number refer to :
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Pls help quick from hegarty maths
The mean lifetime of a bulb is 149.37 hours.
What is the meaning of mean?
By dividing the sum of the given numbers by the entire number of numbers, the mean—the average of the given numbers—is determined. Mean is equal to (Sum of All Observations/Total Observations).
The given table represents a continuous data.
The table attached in below. To get mean lifetime of a bulb, find the mean of the given table.
The formula for mean is = Σ fm/N
Where f is frequency and m is midpoint of the class.
N is total number of observation.
From the table, Σ fm = 53175
Total number of bulb is 356.
The mean lifetime is 53175/ 356 = 149.37 hours
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label the vertices then use the pythagorean theorem to find x
Answer:
5cm. 8cm
Step-by-step explanation:
Label all the vertices then use Pythagorean theorem
c² = a² + b²
A = 2(x + 3) y B = 3(13 + x)
Solve and Graph.
[tex]\tt |4x+1|\:\le 6[/tex]
The value of x from the inequality equation | 4x + 1 | ≤ 6 , is
-7/4 ≤ x ≤ 5/4
What is an Inequality Equation?
Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.
In an inequality, the two expressions are not necessarily equal which is indicated by the symbols: >, <, ≤ or ≥.
Given data ,
Let the equation be A
The value of the equation A is | 4x + 1 | ≤ 6 be equation (1)
From the modulus function rule , we know
If , | x | ≤ a , then -a ≤ x ≤ a
So , on simplifying the equation , we get
-6 ≤ 4x + 1 ≤ 6
Now , the two values are
4x + 1 ≥ -6 be equation (2)
4x + 1 ≤ 6 be equation (3)
From equation (2) , 4x + 1 ≥ -6
Subtracting 1 on both sides , we get
4x ≥ -7
Divide by 4 , we get
x ≥ -7/4
And , From equation (3) , 4x + 1 ≤ 6
Subtracting 1 on both sides , we get
4x ≤ 5
Divide by 4 on both sides , we get
x ≤ 5/4
Therefore , the solution is -7/4 ≤ x ≤ 5/4 and the graph is given below
Hence , The value of x from the inequality equation | 4x + 1 | ≤ 6 , is
-7/4 ≤ x ≤ 5/4
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An animal shelter has cats and dogs available for adoption in a ratio of 3:5. If there are 25 dogs available for adoption, how many cats are available? Use a tape diagram to help organize your thinking. (1 point)
cats
Answer:
15 cats
Step-by-step explanation:
c:d
3:5
5=25
25/5=5
5*3=15
15 cats
======================================================
Explanation:
The tape diagram is shown below.
"C" represents a sub-group of cats, and "D" represents a sub-group of dogs. Each sub-group has the same number of animals.
There are 3 copies of "C" and 5 copies of "D" to represent the ratio 3:5 of cats to dogs. For every 3 cats, there are 5 dogs.
We are told there are 25 dogs available for adoption. This consists of all five blocks of "D" combined. If each "D" is the same number of dogs, then there must be 25/5 = 5 dogs per "D" block. By extension, there are 5 cats per "C" block.
In short, each block has 5 animals.
3 blocks of C = 3*5 = 15 cats are available.
-----------------
Another approach:
C = number of cats available = unknown
D = number of dogs available = 25
C/D = 3/5
C/25 = 3/5
5C = 25*3 ... cross multiply
5C = 75
C = 75/5
C = 15 cats are available
-----------------
A third approach:
The ratio 3:5 scales up to 15:25 after multiplying both parts by 5. This is so the "5" in "3:5" becomes "25".
The ratio of cats to dogs of 15:25 reduces to 3:5 when you divide both parts by the GCF 5.
So this is another way to see how 15 cats are available.
Unless specified, all approximating rectangles are assumed to have the same width. Evaluate the upper and lower sums for f(x) = 1 + cos cos($) -ISXS*, with n = 3, 4, and 6. Illustrate each case with a sketch similar to the figure shown below. (Round your answers to two decimal places.) n = 3: upper sum ll lower sum n = 4: upper sum II lower sum n = 6: upper sum IO lower sum
In this Trigonometric Functions F(x) = 1 + cos(1/X): n=3 (12.01, 8.10), n=4 (11.65,8.50), and n=6 (11.24, 9.12), with their upper and lower value
What is Trigonometric Functions?
Trigonometry uses six fundamental trigonometric operations. Trigonometric ratios describe these operations. The sine function, cosine function, secant function, co-secant function, tangent function, and co-tangent function are the six fundamental trigonometric functions. The ratio of sides of a right-angled triangle is the basis for trigonometric functions and identities. Using trigonometric formulas, the sine, cosine, tangent, secant, and cotangent values are calculated for the perpendicular side, hypotenuse, and base of a right triangle.
F(x) = 1 + cos(1/X)
for n=3
Upper sum = 12.01
Lower sum = 8.10
Δx = (b-a)/n = 2π / 3
for n=4
Upper sum = 11.65
Lower sum = 8.50
Δx = (b-a)/n = π / 2
for n=6
Upper sum = 11.24
Lower sum = 9.12
Δx = (b-a)/n = π / 3
Hence, n=3 (12.01, 8.10), n=4 (11.65,8.50), and n=6 (11.24, 9.12), with their upper and lower value.
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h(x) = 4x-22 for h(12)
The value of h ( 12 ) is 26
What is an Equation?
Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the equation be A
Now , the value of equation A is
h ( x ) = 4x - 22 be equation (1)
Now , to find the value of h ( 12 ) , substitute the value of x = 12 in the equation , we get
h ( x ) = 4x - 22
h ( 12 ) = 4 x 12 - 22
On simplifying the equation , we get
h ( 12 ) = 48 - 26
= 22
Therefore , the value of h ( x ) when x = 12 is 22
Hence , The value of h ( 12 ) is 26
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Which expression is equivalent to13k+7+5(k+6)?
Answer:
18k +37
Step-by-step explanation:
13k + 7 + 5(k + 6)
13k + 7 + 5k + 30
13k + 5k + 7 + 30
18k +37
help meeeeeeeeeeeeeeeeeee pleaseee!!!!help meeeeeeeeeeeeeeeeeee pleaseee!!!!help meeeeeeeeeeeeeeeeeee pleaseee!!!!
a. [tex]123.1(1.069)^3 \approx 150.4[/tex]
b. [tex]123.1(1.069)^{20} \approx 467.5[/tex]
Diana spent 3 hours at the museum. For 1.418 hours she was watching a movie. The rest of the time she spent looking at exhibits. How longs did Diana spend looking at exhibits?
The time that Diana spent looking at the exhibits is given as follows:
1.582 hours.
How to obtain the time that Diana spent looking at the exhibits?As stated in the problem, the total time that Diana spent at the museum is given as follows:
3 hours.
The total time that Diana spent at the museum was divided into two activities, presented as follows:
Watching a movie.Looking at exhibits.The times of each activity are given as follows:
Watching a movie: 1.418 hours.Looking at exhibits: x hours.Then the time that Diana spent looking at exhibits is obtained as follows:
x + 1.418 = 3
The time is obtained by the subtraction of 3 by 1.418 as follows:
x = 3 - 1.418
x = 1.582 hours.
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Units help please due today 50 points
Answer:
12.8
Step-by-step explanation:
You can see that triangle DAF and BED are equal.
So lineAF is lineDE.
6.4*2=12.8.
Nevaeh is working two summer jobs, making $14 per hour lifeguarding and making $25 per hour tutoring. In a given week, she can work no more than 11 total hours and must earn no less than $200. If x represents the number of hours lifeguarding and y represents the number of hours tutoring, write and solve a system of inequalities graphically and determine one possible solution.
The system of equations are
x + y < 1114x + 25y < 200The solution of the equation from the graph is
x = 6.8181y = 4.1818How to find the system of equationsThe system of equations is derived from the statements as interpreted below
If x represents the number of hours lifeguarding and y represents the number of hours tutoring
number of hours lifeguarding = x
number of hours tutoring = y
she can work no more than 11 total hours
x + y not more than 11 hours
x + y < 11
making $14 per hour lifeguarding and making $25 per hour tutoring and must earn no less than $200
$14x + $25y no less than $200
14x + 25y > 200
The required equations are
14x + 25y > 200
x + y < 11
The graph is attached
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It has long been thought that the length of one's femur is positively correlated to the length of one's tibia. The following are data for a classroom of students who measured each (approximately) in inches. Femur Length Tibia Length 18.7 14.2 20.5 15.9 16.2 13.1 15.0 12.4 19.0 16.2 21.3 15.8 21.0 16.2 14.3 12.1 15.8 13.0 18.8 14.3 18.7 13.8 Regression Statistics Multiple R 0.9305 R Square 0.8659 Adjusted R Square 0.8510 Standard Error 0.5963 Observations ANOVA SS MS F Significance F Regression 1 20.6611 20.6611 58.0968 3.25116E-05 Residual 9 3.2007 0.3556 Total 10 23.8618 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Intercept 3.5850 1.4137 2.5359 0.0319 0.3871 6.7830 Femur Length 0.5899 0.0774 7.6221 0.0000 0.4148 0.7650 A strong linear correlation was found between the two variables. Find the standard error of estimate. Round answer to 4 decimal places.
The linear correlation between the given two variables be,
4.5y + 5.2x = 168.34
Given, data for a classroom of students who measured each (approximately) in inches.
Femur Length 18.7 14.2 20.5 15.9 16.2 13.1 15.0 12.4 19.0 16.2 21.3
Tibia Length 15.8 21.0 16.2 14.3 12.1 15.8 13.0 18.8 14.3 18.7 13.8
we have to find a linear correlation between the two variables,
linear correlation be,
(y - 15.8)/(x - 18.7) = (15.8 - 21.0)/(18.7 - 14.2)
(y - 15.8)/(x - 18.7) = (- 5.2)/4.5
4.5y - 71.1 = -5.2x + 97.24
4.5y + 5.2x = 168.34
So, the linear correlation between the given two variables be,
4.5y + 5.2x = 168.34
Hence, the linear correlation between the given two variables be,
4.5y + 5.2x = 168.34
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Type the correct answer in each box. Use numerals instead of words for numbers. If necessary, use / for the fraction bar(s). The amount of time it takes a water pump to empty a tank varies directly as the capacity of the tank. If it takes a water pump 2. 5 hours to empty a tank containing 60,000 gallons of water, how long does it take the same pump to empty a tank containing 108,000 gallons of water? it will take hours to empty the second tank.
An equation is formed when two equal expressions. The time the same pump will take to empty a tank containing 108,000 gallons of water is 4.5 hours.
What is an equation?When two equal expressions are added together with the aid of the equal sign "=," an equation is created.
Given that the time it takes a water pump to empty a tank directly correlates with the tank's capacity. Consequently, the relationship can be expressed as,
V ∝ T
V = kT
Substituting the volume and time in the equation,
60,000 gallons = 2.5 hours × k
Solving the equation for k,
k = 60,000 gallons / 2.5 hours
k = 24,000 gallons per hour
Now, the equation for the relationship can be written as,
V = 24,000 gallons per hour × T
Now, the time the same pump will take to empty a tank containing 108,000 gallons of water is,
V = 24,000 gallons per hour × T
108,000 gallons = 24,000 gallons per hour × T
108,000 gallons / 24,000 gallons per hour = T
T = 4.5 hours
Hence, the time the same pump will take to empty a tank containing 108,000 gallons of water is 4.5 hours.
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What is the area of this triangle?
3 cm height
8 cm base
Answer: 12cm^2
Step-by-step explanation: We use the equation 1/2(bh) to get the area. If you put the number in the equation you will get the answer 12.
Assume that 40% of students at SCC receive A or B’s, 35% receive C’s, and 25% receive
D or F’s. A survey of 300 r/s UC Davis students indicates that 100 of them received A or
B’s, 130 received C’s, and 70 received D or F’s. Do these results provide strong evidence
that the overall percentages of the 3 grade categories at UC Davis are not all the same as
the ones at SCC? Perform a hypothesis test and use a p-value to draw and explain your
conclusion
We have sufficient evidence to conclude that the over all percentages of 3 categories are not same.
What is meant by percentage?The percentage refers to a specific percentage out of a hundred. It is a fraction with the denominator 100, and the sign for it is 1%.
The Latin word per centum, which means "hundred" or "by the hundred," is the source of the word "percent." The Italian phrase per cento, which means "for a hundred," gradually shrank to become the symbol for "percent," which is now used globally. It finally vanished totally. The word "per" was frequently shortened to "p." The contemporary "%" symbol was created by condensing the "cento" to two circles divided by a horizontal line.
Category Observed([tex]O_{i}[/tex]) Expected([tex]E_{i}[/tex]) ([tex]O_{i}[/tex]-[tex]E_{i}[/tex])²/[tex]E_{i}[/tex]
A or B 100 120 3.333
C 130 105 5.9524
D or F 70 75 0.056
Total 300 300 9.3417
H₀:over percentages are same at UC Davis and at SSC
H₁:They are not same
Test statistic
X²=∑ ([tex]O_{i}[/tex]-[tex]E_{i}[/tex])²/[tex]E_{i}[/tex]
=9.3417
P-value=P(X²(n-1)>9.3417)
=0.0094
Here we can see that the P-value is very low(<0.05 and <0.01)
So, we reject the null hypothesis H₀.
Therefore, we have sufficient evidence to conclude that the over all percentages of 3 categories are not same.
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I can't theme to grasp these questions can someone please explain the steps ?
Answer:
(i) See below for proof.
(ii) x = 1.823, x = -0.823
Step-by-step explanation:
Part (i)Given equation:
[tex]\dfrac{x+2}{x+1}+\dfrac{3}{x}=3[/tex]
Make the denominators of the fractions the same:
[tex]\implies \dfrac{x+2}{x+1}\cdot \dfrac{x}{x}+\dfrac{3}{x}\cdot \dfrac{x+1}{x+1}=3[/tex]
[tex]\implies \dfrac{x(x+2)}{x(x+1)}+\dfrac{3(x+1)}{x(x+1)}=3[/tex]
[tex]\textsf{Apply the fraction rule} \quad \dfrac{a}{c}+\dfrac{b}{c}=\dfrac{a+b}{c}:[/tex]
[tex]\implies \dfrac{x(x+2)+3(x+1)}{x(x+1)}=3[/tex]
Multiply both sides of the equation by x(x + 1) to eliminate the denominator of the fraction on the LHS:
[tex]\implies x(x+2)+3(x+1)=3x(x+1)[/tex]
Expand the brackets:
[tex]\implies x^2+2x+3x+3=3x^2+3x[/tex]
[tex]\implies x^2+5x+3=3x^2+3x[/tex]
Subtract x² from both sides:
[tex]\implies 5x+3=2x^2+3x[/tex]
Subtract 5x from both sides:
[tex]\implies 3=2x^2-2x[/tex]
Subtract 3 from both sides:
[tex]\implies 0=2x^2-2x-3[/tex]
[tex]\implies 2x^2-2x-3=0[/tex]
Part (ii)[tex]\boxed{\begin{minipage}{3.6 cm}\underline{Quadratic Formula}\\\\$x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$\\\\when $ax^2+bx+c=0$ \\\end{minipage}}[/tex]
To solve the quadratic equation [tex]2x^2-2x-3=0[/tex], use the quadratic formula.
Therefore:
a = 2b = -2c = -3Substitute these values into the formula and solve for x:
[tex]\implies x=\dfrac{-(-2) \pm \sqrt{(-2)^2-4(2)(-3)}}{2(2)}[/tex]
[tex]\implies x=\dfrac{2 \pm \sqrt{4+24}}{4}[/tex]
[tex]\implies x=\dfrac{2 \pm \sqrt{28}}{4}[/tex]
[tex]\implies x=\dfrac{2 \pm \sqrt{4 \cdot 7}}{4}[/tex]
[tex]\implies x=\dfrac{2 \pm \sqrt{4} \sqrt{7}}{4}[/tex]
[tex]\implies x=\dfrac{2 \pm 2 \sqrt{7}}{4}[/tex]
[tex]\implies x=\dfrac{1 \pm \sqrt{7}}{2}[/tex]
Therefore, the solutions correct to 3 decimal places are:
[tex]x=1.823,\;\; x= -0.823[/tex]
He creates paths through the garden along line segment a b, line segment x y, and line segment z y. Which correctly compares the lengths of the paths?the path along line segment x y is longer than the path along line segment z y, and the path along line segment z y is longer than the path along line segment a b. The path along line segment a b is longer than the path along line segment z y, and the path along line segment z y is longer than the path along line segment x y. The path along line segment z y is longer than the path along line segment x y, and the path along line segment x y is longer than the path along line segment a b. The path along line segment z y is longer than the path along line segment a b, and the path along line segment a b is longer than the path along line segment x y.
The journey along Line segment X Y is longer than the path along Line segment Z Y, and the path along Line segment Z Y is longer than the path along Line segment A B, hence Option-A is the correct answer.
Given that,
He makes paths that follow Line segments A and B, X and Y, and Z and Y through the garden.
We have to find which accurately compares the pathways' lengths.
We know that,
The length of the third side in a triangle is proportional to the angle Ф if the lengths of the two sides that make up the angle Ф are fixed.
XY > YZ because XY's opposing angle (79°) is greater than YZ's (65°).
As before, YZ > AB because the opposing angle of YZ (65°) is greater than that of AB (36°).
Since both sides of the angle are the same length (8 feet),
As a result, assertion A. is accurate. (Answer)
Therefore, The journey along Line segment X Y is longer than the path along Line segment Z Y, and the path along Line segment Z Y is longer than the path along Line segment A B, hence Option-A is the correct answer.
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Answer:
It's A
Step-by-step explanation:
I got 100 on the quiz
1. A painting crew bought 45 gallons of paint for a job. The crew members used 5 gallons of paint per hour until they used all the paint. Sketch a graph to represent the start to the end of the job, assuming all paint was used. Be sure to title your graph, label your axes, and label your intercepts. This must be graphed by hand or by using the tools in Word. You may not use a web-based graphing program.
The graph that shows the equation, y = -5x + 45, that represents the scenario given is shown in the attachment.
How to Graph a Linear Equation?Determine the slope (m) and the y-intercept (b), then input the values in the equation, y = mx + b, to write the equation of the line that would be graphed.
Given the information above, we have the following:
Let x = hours, and y = quantity of gallons of paint left
Slope (m) = -5
Y-intercept (b) = 45
Write the equation of the graph by substituting m = 5 and b = 45 into y = mx + b:
y = -5x + 45
The graph shown below for y = 5x + 45 would be labelled as follows:
x-axis = hours
y-axis = quantity of paint (in gallons)
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