What are the zeros of f(x) = x^2 - x - 12?
A. x= -4 and x= 3
B. x=-3 and x = 4
C. x=-2 and x = 6
D. x=-6 and x = 2
Answers
Answer:
B. x = -3 and x = 4
General Formulas and Concepts:
Algebra I
Terms/CoefficientsFactoringSolving quadraticsStep-by-step explanation:
Step 1: Define
Identify
f(x) = x² - x - 12
Step 2: Solve for x
Factor: (x - 4)(x + 3) = 0Solve: x = 4, -3Related Questions
Jessica got back an exam and she earned 95 out of 100 points. Is her score an example of a raw score or a transformed score?
Answers
Answer:
Raw Score
Step-by-step explanation:
A raw score is a datum point or value that has not been altered in any way. Raw scores are original measurements from surveys, tests, or other instruments that have not been weighted, transformed, or converted into any other form. Raw scores are also called observed scores.
Therefore
It is a Raw score
et f(x)=6(2)x−1+4. The graph of f(x) is translated 7 units to the left to form the graph of g(x). Enter the equation for g(x) in the box.
Answers
Answer:
[tex]g(x) = 6(2)^{x -8}+ 4[/tex]
Step-by-step explanation:
Given
[tex]f(x) = 6(2)^{x - 1}+ 4[/tex]
Required
Find g(x)
From the question, f(x) is translated 7 units left;
The rule of translation is: [tex](x,y) \to (x-7,y)[/tex]
So, we have:
[tex]g(x) = f(x - 7)[/tex]
[tex]g(x) = 6(2)^{x -7- 1}+ 4[/tex]
[tex]g(x) = 6(2)^{x -8}+ 4[/tex]
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 444 gram setting. It is believed that the machine is underfilling the bags. A 41 bag sample had a mean of 440 grams with a variance of 441. Assume the population is normally distributed. A level of significance of 0.05 will be used. Specify the type of hypothesis test.
Answers
Answer:
The null hypothesis is [tex]H_0: \mu = 444[/tex]
The alternative hypothesis is [tex]H_1: \mu < 444[/tex]
The p-value of the test is 0.1148 > 0.05, which means that the sample does not give enough evidence to conclude that the machine is underfilling the bags.
Step-by-step explanation:
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 444 gram setting.
At the null hypothesis, we test if the machine works correctly, that is, the mean is of 444. So
[tex]H_0: \mu = 444[/tex]
At the alternative hypothesis, we test if they are underfilling, that is, if the mean is of less than 444. So
[tex]H_1: \mu < 444[/tex]
The test statistic is:
[tex]t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.
444 is tested at the null hypothesis:
This means that [tex]\mu = 444[/tex]
A 41 bag sample had a mean of 440 grams with a variance of 441.
This means that [tex]n = 41, X = 440, s = \sqrt{441} = 21[/tex]
Value of the test statistic:
[tex]t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}[/tex]
[tex]t = \frac{440 - 444}{\frac{21}{\sqrt{41}}}[/tex]
[tex]t = -1.22[/tex]
P-value of the test:
Right-tailed test(test if the mean is less than a value), with 41 - 1 = 40 df and t = -1.22.
Using a t-distribution calculator, this p-value is of 0.1148
The p-value of the test is 0.1148 > 0.05, which means that the sample does not give enough evidence to conclude that the machine is underfilling the bags.
g Let the joint probability density function of random variables X and Y. (a) Calculate the marginal probability densities of X and Y . (b) Calculate the expected values of X and Y . be given by
Answers
Answer: hello your question is incomplete attached below is the complete question
answer:
a) Fx(X) = 0 ≤ x ≤ 2, Fy(Y) = y - y^3/4
b) E(X) = 32/20 , E(Y) = 64/60
Step-by-step explanation:
a) Marginal probability density
Fx(X) = [tex]\int\limits^x_0 {\frac{xy}{2} } \, dy[/tex]
∴ probability density of X = 0 ≤ x ≤ 2
Fy(Y) = [tex]\int\limits^2_y {\frac{xy}{2} } \, dx[/tex]
∴ probability density of Y = y - y^3/4
b) Determine the expected values of X and Y
E(X) = 32/20
E(Y) = 64 /60
attached below is the detailed solution
Expand and simplify (x-3)(x+5)
Answers
Answer:
x^2 + 2x -15
Step-by-step explanation:
(x-3) (x+5)
x * (x+5) -3(x+5)
x^2 + 5x - 3x - 15
x^2 + 2x - 15
Answered by Gauthmath
Which of the following is an arithmetic sequence?
O 1,-3,9,-27...
0-2, 4, -6, 8, ...
-8, -6, -4,-2....
O2, 4, 8, 16, ...
Answers
9514 1404 393
Answer:
(c) -8, -6, -4, -2, ...
Step-by-step explanation:
An arithmetic sequence has sequential terms that have a common difference.
The first differences of the offered sequences are ...
a) -4, 12, -36
b) 6, -10, 14
c) 2, 2, 2 . . . . . . constant, so an arithmetic sequence
d) 2, 4, 8
__
The arithmetic sequence is -8, -6, -4, -2, ....
Write the nth term of the following sequence in terms of the first term of the sequence.
10, 20, 40,-
Answers
Answer:
10*(2)^(n-1)
Step-by-step explanation:
The common ratio of the sequence is 20/10=40/20=2.
The first term is 10 so the equation is 10*(2)^(n-1)
Answer:
10(2)^n-1
Step-by-step explanation:
Correct on Odyssey
Refer to the picture avove
Answers
Answer:
34°
Step-by-step explanation:
using tan ( tan x = opposite/adjacent)
tan x = 7/10
we solve for x by moving the tan and turning tan into tan^-1 which is inverse tangent
x = tan^-1 = 7/10
x = 35
exact answer: 34.99202
Answer:
dm
Step-by-step explanation:
A housing official in a certain city claims that the mean monthly rent for apartments in the city is less than $1000. To verify this claim, a simple random sample of 47 renters in the city was taken, and the mean rent paid was $941 with a standard deviation of $245. Can you conclude that the mean monthly rent in the city is less than $1000
Answers
Answer:
The p-value of the test is 0.053, which is more than the standard significance level of 0.05, and thus it cannot be concluded that the mean monthly rent in the city is less than $1000.
Step-by-step explanation:
A housing official in a certain city claims that the mean monthly rent for apartments in the city is less than $1000.
At the null hypothesis, we test if the mean is of at least $1000, that is:
[tex]H_0: \mu \geq 1000[/tex]
At the alternative hypothesis, we test if the mean is less than $1000, that is:
[tex]H_1: \mu < 1000[/tex]
The test statistic is:
We have the standard deviation for the sample, so the t-distribution is used.
[tex]t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.
1000 is tested at the null hypothesis:
This means that [tex]\mu = 1000[/tex]
To verify this claim, a simple random sample of 47 renters in the city was taken, and the mean rent paid was $941 with a standard deviation of $245.
This means that [tex]n = 47, X = 941, s = 245[/tex]
Value of the test statistic:
[tex]t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}[/tex]
[tex]t = \frac{941 - 1000}{\frac{245}{\sqrt{47}}}[/tex]
[tex]t = -1.65[/tex]
P-value of the test and decision:
The p-value of the test is found using a left-tailed test(test if the mean is less than a value), with t = -1.65 and 47 - 1 = 46 df.
Using a t-distribution calculator, the p-value is of 0.053.
The p-value of the test is 0.053, which is more than the standard significance level of 0.05, and thus it cannot be concluded that the mean monthly rent in the city is less than $1000.
The blue Sox baseball won 40 games out of 48 games played. The Green Sox won 27 games of 45 games played. Which team won the greater percentage of the game? By what percent?
Answers
Step-by-step explanation:
40 won dividend 48 games
= 40/48 x 100
83.33% Win
Green Sox
27/45 x 100
60%
so Conclusion
The most Won Greatest Between Blue & Green are
Sox Have 83.33% Won
How many bottles can you drink?
You have 120 bottles of Cola and 120 bottles of Sprite.
You can exchange 3 empty Cola bottles for a new bottle of Sprite.
You can exchange 4 empty Sprite bottles for a new bottle of Cola.
You can borrow bottles, but must return them in the end.
What is the maximal number of bottles of drink that you can drink? Prove the optimality of your result.
As this is a puzzle, please give short and clever answers rather than tedious bruteforce calculations.
Answers
Answer:
[tex]thank \: you[/tex]
An industrial psychologist consulting with a chain of music stores knows that the average number of complaints management receives each month throughout the industry is 4, but the variance is unknown. Nine of the chain's stores were randomly selected to record complaints for one month; they received 2, 4, 3, 5, 0, 2, 5, 1, and 5 complaints. Using the .05 significance level, is the number of complaints received by the chain different from the number of complaints received by music stores in general?
1. Use the five steps of hypothesis testing.
2. Sketch the distributions involved
3. Explain the logic of what you did to a person who is familiar with hypothesis testing, but knows nothing about t tests of any kind. Be sure to explain how this problem differs from a problem with a known population variance and a single sample.
Answers
Answer: See explanation
Step-by-step explanation:
1. Use the five steps of hypothesis testing.
Step 1: The aim of the research is to conduct the five steps of hypothesis testing.
Step 2:
Null hypothesis: H0 u= 4
Population mean: H1 u = 4
Alternate hypothesis: u ≠ 4
Population mean: u ≠ 4
Step 3 and step 4 are attached.
Step 5: Based on the calculation, the calculated value of t is less than the t critical value, therefore, the null hypothesis will be failed to be rejected.
2. Sketch the distributions involved
This has been attached.
3. Explain the logic of what you did to a person who is familiar with hypothesis testing, but knows nothing about t tests of any kind.
The distribution is "t".
The means is tested by using T-test.
Chi-square is used to test the single variance.
Find the missing side lengths help please?
Answers
Answer:
Step-by-step explanation:
Answer:
y=2, x=4
Step-by-step explanation:
sin60=2sqrt3/x
so x = 2sqrt3/sin60
and x=4
for the value of y, use pythagorean theorem to get
16=y^2+12
which gives you y=2
A trough is 12 ft long and its ends have the shape of isosceles triangles that are 3 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 14 ft3/min, how fast is the water level rising when the water is 4 inches deep
Answers
Answer:
[tex]\frac{dh}{dt}=0.5ft[/tex]
Step-by-step explanation:
From the question we are told that:
Length [tex]l=12[/tex]
Top length [tex]l_t=3ft[/tex]
Height [tex]h=1ft[/tex]
Rate [tex]R=14 ft3/min[/tex]
Water rise [tex]w=4[/tex]
Generally the equation for Velocity is mathematically given by
[tex]V=frac{1}{2}wh'(l)\\\\V=frac{1}{2}wh'(12)[/tex]
[tex]V=18h'^2[/tex]
Therefore
[tex]R=18(2h)(\frac{dh}{dt})[/tex]
Where
[tex]h=\frac{3}{4}[/tex]
Therefore
[tex]\frac{dh}{dt}=\frac{R}{18(2h)}[/tex]
[tex]\frac{dh}{dt}=\frac{14}{18(2.3/4)}[/tex]
[tex]\frac{dh}{dt}=0.5ft[/tex]
The number of nickels from a particular year found in a sample of 1,000 is related to the number of nickels that were minted that year. This can be expressed as y=2.04x+0.806 where x is the number of nickels minted in a particular year in hundreds of millions and y is the number of nickels from that year in a sample of 1,000.
What does the slope of the line represent?
A. the additional number of nickels from a particular year you'd expect to find in a sample of 1,000 for every additional hundred million minted
B. number of nickels in a sample of 1,000 from a year in which none were minted
C. number of nickels in a sample of 1,000 from year zero
D. the number of nickels you would expect to find in a sample of 1,000 for every hundred million minted
Answers
A number of nickels in a sample of 1,000 from a year in which none were minted. The correct option is B.
What is an equation?It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
Given that year found in a sample of 1,000 is related to the number of nickels that were minted that year.
This can be expressed as y=2.04x+0.806 where x is the number of nickels minted in a particular year in hundreds of millions and y is the number of nickels from that year in a sample of 1,000.
The slope of the line represents the number of nickels in a sample of 1,000 from a year in which none were minted.
Therefore, the correct option is B.
To know more about an equation follow
https://brainly.com/question/18831322
#SPJ2
Write an equation of the line that passes through a pair of points: (-5, -2), (3, -1) y=-x+ C. y=-- x - 11 11 a. 8 8 b. 11 d. y=-x+ 8 y=-x - 8 11
Answers
Answer:
y = 8x+11
Step-by-step explanation:
The coordination of the points are : (-5,-2) , (3, -1)
Then, the equation is :
[tex]\frac{y+5}{x+2} =\frac{-5-3}{-2+1} \\\\or,\frac{y+5}{x+2} = 8\\or, y+5=8(x+2)\\or, y = 8x+16-5\\y= 8x+11[/tex]
What is the domain and range of the graph below?
Answers
9514 1404 393
Answer:
domain: all real numbersrange: y ≥ 0Step-by-step explanation:
The domain is the horizontal extent of the graph. For a graph like this, we assume the ends extend to infinity, both horizontally and vertically. Then the horizontal extent (domain) is from -infinity to +infinity: all real numbers.
The graph does not go below y=0, so the vertical extent (range) is y ≥ 0.
Whats The Correct Answer?!
Answers
Answer: the correct answer is D 0.05
Step-by-step explanation:
Answer:
0.02 m/s
Step-by-step explanation:
42/50 meters in 26/30 minutes,
26/30 minutes = 52 seconds
so in 1 second, 42/50 ÷ 52
= 42/50 × 1/52
= 21/1300
= 0.02 (approximately)
Answered by GAUTHMATH
Which of the following are best described as lines that meet to form a right
angle?
A. Parallel lines
B. Lines that are coplanar
C. Perpendicular lines
D. Intersecting lines
Answers
Answer:
A line is said to be perpendicular to another line if the two lines intersect at a right angle. An angle is said to be a right angle if its measure is 90 degrees.
add:7ab,8ab,-10ab,-3ab
Answers
Answer:
2ab
Step-by-step explanation:
7ab+8ab+(-10ab)+(-3ab)=
=15ab-13ab= 2ab
Answer:
2ab
Step-by-step explanation:
7ab+8ab+-10ab+-3ab
Factor out ab
ab(7+8-10-3)
ab(2)
2ab
Help please Find the surface area, including the floor, of his tent.
Answers
Answer:
52.8 m. sq.
Step-by-step explanation:
2.6 x 1.5 + 1.5 (3) = 7.8 / 2 = 3.9 x 2 = 7.8 (Triangles)
3 x 5 = 15 x 2 = 30 (Side Rectangles)
5 x 1.5 + 1.5 (3) = 15
15 + 30 + 7.8 = 52.8 m. sq.
Hope this helps!
If something is wrong, please let me know.
A game consists of tossing three coins. If all three coins land on heads, then the player wins $75. If all three coins land on tails, then the player wins $45. Otherwise, the player wins nothing. On average, how much should a player expect to win each game
Answers
Answer:
On average, a player should expect to win $15.
Step-by-step explanation:
The expected value in an event with outcomes:
x₁, x₂, ..., xₙ
Each with probability:
p₁, ..., pₙ
is given by:
Ev = x₁*p₁ + ... +xₙ*pₙ
In this case we have 3 outcomes:
player wins $75 = x₁
player wins $45 = x₂
player does not win = x₃
Let's find the probabilities of these events.
player wins $75)
Here we must have the 3 coins landing on heads, so there is only one possible outcome to win $75
While the total number of outcomes for tossing 3 coins, is the product between the number of outcomes for each individual event (where the individual events are tossing each individual coin, each one with 2 outcomes)
Then the number total of outcomes is:
C = 2*2*2 = 8
Then the probability of winning $75 is the quotient between the number of outcomes to win (only one) and the total number of outcomes (8)
p₁ = 1/8
Win $45:
This happens if the 3 coins land on tails, so is exactly equal to the case above, and the probability is the same:
p₂ = 1/8
Not wining:
Remember that:
p₁ + p₂ + ... + pₙ = 1
Then for this case, we must have:
p₁ + p₂ + p₃ = 1
1/8 + 1/8 + p₃ = 1
p₃ = 1 - 1/8 - 1/8
p₃ = 6/8
Then the expected value will be:
Ev = $75*1/8 + $45*1/8 + $0*6/8 = $15
On average, a player should expect to win $15.
I need help with this
Answers
Answer:
Yes because 5^2 + 12^2 = 13^2
Step-by-step explanation:
We can check using the Pythagorean theorem
a^2 + b^2 = c^2
5^2 + 12^2 = 13^2
25+ 144= 169
169 = 169
9514 1404 393
Answer:
D. Yes, because 5² +12² = 13²
Step-by-step explanation:
To determine if a triple of three numbers will form a right triangle, see if they satisfy the Pythagorean theorem. If they do, the sum of the squares of the smaller two numbers will equal the square of the largest.
Here, we have ...
5² + 12² ?? 13²
25 +144 ?? 169
169 = 169 . . . . . . these side lengths will form a right triangle
_____
Additional comment
Three integer numbers like these that will satisfy the Pythagorean theorem are called a "Pythagorean triple." A few such triples that are commonly seen in algebra and trig problems are ...
(3, 4, 5), (5, 12, 13), (7, 24, 25), (8, 15, 17), (9, 40, 41)
It is worthwhile to remember a few of these, as you will see them again.
guys what is ascending order again
Answers
Answer:
78
Step-by-step explanation:
In this graph, which transformation can produce quadrilateral A′B′C′D′ from quadrilateral ABCD?
Answers
Answer:
A reflection across the y axis and then a reflection across the x axis
Step-by-step explanation:
Answer:
An 180 degree counterclockwise rotation around the origin
Step-by-step explanation:
plato/edmuntum answer
The Smith family has
bought an above ground
pool. The manufacture
recommends that it be filled
to within 1 foot of the rim.
What is the volume of the
water at this height.
37. (V=TTr?h) (use 3.14 for TT)
a. 7536 cubic feet
b. 6280 cubic feet
c. 1570 cubic feet
d. 1884 cubic feet
Answers
Answer:
b. 6280 cubic feet
Step-by-step explanation:
Volume:
The volume of the prism, which has a cylindrical base, with radius r and height h, is given by:
[tex]V = \pi r^2h[/tex]
Radius:
The radius is 20, so [tex]r = 20[/tex]
The manufacture recommends that it be filled to within 1 foot of the rim.
Height of 6 - 1 = 5, so [tex]h = 5[/tex]
Then
[tex]V = 3.14*(20)^2*5 = 6280[/tex]
So the volume is 6280 cubic feet, and the correct answer is given by option b.
A certain store sells small, medium, and large toy trucks in each of the colors red, blue,green, and yellow. The store has an equal number of trucks of each possible color/sizecombination. If Stella wants a medium red truck and her mother will randomly select oneof the trucks in the store, what is the probability that the truck she selects will have atleast one of the two features that Stella wants
Answers
Answer:
The probability that the truck she selects will have at least one of the two features that Ella Stella wants is 50%.
Step-by-step explanation:
Since a certain store sells small, medium, and large toy trucks in each of the colors red, blue, green, and yellow, and the store has an equal number of trucks of each possible color / size combination, if Stella wants a medium red truck and her mother will randomly select one of the trucks in the store, to determine what is the probability that the truck she selects will have at least one of the two features that Stella wants, the following calculation must be performed:
3 sizes
4 colors
4 x 3 = 12
4 midsize cars
3 red cars
1 medium red car
4 + 3 - 1 = 6
6/12 = 0.5
Therefore, the probability that the truck she selects will have at least one of the two features that Ella Stella wants is 50%.
When planning a more strenuous hike, Brett figures that he will need at least 0.5 liters of water for each hour on the trail. He also plans to always have at least 1.80 liters of water as a general reserve. If x represents the duration of the hike (in hours) and y represents the amount of water needed (in liters) for a hike, the following inequality describes this relation:
y greater or equal than 0.5 x plus 1.8
Which of the following would be a solution to this situation?
Answers
Answer:
Having 4.5 liters of water for 4 hours of hiking
Step-by-step explanation:
If you plug in 4.5 for y and 4 for x, you get:
4.5 greater or equal than 0.5 left parenthesis 4 right parenthesis plus 1.8
4.5 greater or equal than 2 plus 1.8
4.5 greater or equal than 3.8
This is a true statement so having 4.5 liters of water for 4 hours of hiking would be a solution.
Find the probability that a randomly selected point within the square falls in the blue shaded area (circle). r = 2 in [? ]% Round to the nearest tenth of a percent.
Answers
Answer:
78.5 %
Step-by-step explanation:
the probability = π(2)² / (4×4) ×100%
= 4π /16 × 100%
= π/4 ×100%
= (π×25)%
= 3.14 × 25 %
= 78.5 %
Point A lies outside of plane P, how many lines can be drawn parallel to plane P that pass through point A?
A. 0
B. 1
C. 2
D. an infinite number
Answers
Answer:
B. an infinite number
Step-by-step explanation:
Since point A lies outside of P, the number of lines that can be drawn parallel to P and passing through point A is only infinite. It is infinite because it is just one given point lying outside the plane. If there is more than one point then it will be otherwise.
Answer:
yeah
Step-by-step explanation:
