Answer:
Step-by-step explanation:
Y=-7 X-20 =
Whats the order of rotational symmetry for brainlest
Answer:
1Step-by-step explanation:
A circle has rotation symmetry around the center for every angle. A circle has an unlimited number of angles of symmetry and the order of its rotation is infinite.
If y = arctan(cosx), then dy/dx
Answer:
sure what are we gonna do
Step-by-step explanation:
An equilateral triangle has has an era of 43.5 square feet the height is 8.5 feet what is the Perimeter of the triangle
Answer:
30.7 ft
Step-by-step explanation:
An equilateral triangle with area 43.5 has a height of 8.68 not 8.5
I will do the problem as written even though it is not a possible equilateral triangle
---------------------------------------------
a = (1/2)bh
43.5 = (1/2)b(8.5)
43.5 = 4.25b
b = 43.5/4.25
b = 10.2352941176
-----------------------
p = 3b
p = 3 * 10.2352941176
p = 30.7058823528
~ 30.7 ft
What is the vertex of the absolute value function below?
Answer:
(-3,2)
Step-by-step explanation: The bottom most point of the graph is 3 back from 0 and 2 up from 0
PLEASE HELP!!!
WILL MARK BRAINLIEST!!!
Solve for X and Y in the rectangle.
Thank you!m
Y = 20
X = 70
We know Y is 20 because both triangles are the same size. 20 is in the opposite corner to Y. The right corner is 90 degrees. There are 180 degrees in a triangle. To get your answer you are going to add 20 and 90 to get 110 then you will subtract 110 from 180.
Solve the equation for the variable b: ab - 2c = 4
Answer:
b = (4+2c)/a
Step-by-step explanation:
ab - 2c = 4
Add 2c to each side
ab - 2c+2c = 4+2c
ab = 4+2c
Divide each side by a
ab/a = (4+2c)/a
b = (4+2c)/a
Answer:
b = 4 + 2c / a
Step-by-step explanation:
ab - 2c = 4
ab - 2c + 2c = 4 + 2c ..( add 2 both side)
ab = 4 + 2c
ab / a = 4 + 2 c / a ...( Divide each side by a)
b = 4 + 2c / a
write 0.824 as a fraction in the simplest form
What is -6(9-9v)
Please only answer with the answer
Answer:
v = 1
Step-by-step explanation:
-6(9-9v)
-6*9 = -54
-6*(-9v) = 54v
-54+54v = 0
+54 +54
54v = 54
divide both sides by 54
v = 1
Do less Republicans (group A) then Democrats (group B) favor the government investing billions of dollars to improve the country's train system? One thousand Republicans and one thousand Democrats were asked if they favored spending billions to improve the country's train system. How would we write the alternative hypothesis?
A. Ha: pA - pB does not equal 0
B. Ha: pA - pB < 0
C. Ha: pA - pB > 0
D. Ha: pA - pB = 0
Answer:
I don't understand at all
determine the missing angle.
The angle at the vertex of a rectangle is 90°
So, it means that,
= ? + 40 = 90
= ? = 90 - 40
= ? = 50
Answer:
50°
Step-by-step explanation:
x = ?°
x + 40° = 90°
x = 90° - 40°
x = 50°
I'm struggling on calculus. PLEASE HELP ASAP. use red writing to help out.
Step-by-step explanation:
1. Given: a = 4t + 4
We know that
[tex] a = \frac{dv}{dt} \: \: or \: dv = adt[/tex]
By definition, the integral of a power function x^n is
[tex] \int {x}^{n} dx = \frac{ {x}^{n + 1} }{n + 1} + k[/tex]
Integrating the acceleration a, we get
[tex]v = \int adt = \int(4t + 4)dt = 2 {t}^{2} + 4t + k[/tex]
where k = constant of integration. We know that v = 10 when t = 0 so when we do the substitution, we get k = 10 therefore, the final expression for v is
[tex]v = 2 {t}^{2} + 4t + 10[/tex]
To find s, we need to integrate v. Knowing that
[tex]v = \frac{ds}{dt} \: \: or \: s = \int v \: dt[/tex]
[tex]s = \int(2 {t}^{2} + 4t + 10)dt[/tex]
[tex] = \frac{2}{3} {t}^{3} + 2 {t}^{2} + 10t + k[/tex]
where k once again is the constant of integration. We know that s = 2 when t = 0, which gives us k = 2. Therefore, the final expression for s is
[tex]s = \frac{2}{3} {t}^{3} + 2 {t}^{2} + 10t + 2[/tex]
2. The potential difference V between two boundaries a and b is given by
[tex]V = \frac{q}{2\pi \epsilon_0 \epsilon_r} \int_{b}^{a} \frac{dr}{r} [/tex]
Note that the integral in the expression above can be rewritten and the integrated as
[tex] \int_{b}^{a} \frac{dr}{r} =\int_{b}^{a} {r}^{ - 1} dr = \ln |a| - \ln |b| [/tex]
so the potential difference V is then J
[tex]V = \frac{q}{2\pi \epsilon_0 \epsilon_r} \int_{b}^{a} \frac{dr}{r}[/tex]
[tex] = \frac{2 \times {10}^{ - 6} }{2\pi (8.85\times {10}^{ - 12}) (2.77)}( \ln |20| - \ln |10| )[/tex]
[tex] = 9000 \: V[/tex]
What is the solution to the equation blow?
x + 6 = 24
What angle corresponds to 1/6 of a circle
Name this triangle by its sides and angles. This is a(n) ____________________ triangle.
a triangle with one right angle and three non-congruent sides
right triangle
Hope this helps! :)
Jasmine ran 5 miles in 42.5 minutes. Caroline ran 3 miles in 26.4 minutes. Who ran at a faster pace?
Answer:
Caroline
Step-by-step explanation:
[tex]\frac{1}{5}: \frac{y}{42.5}[/tex]
y × 5 = 1 × 42.5
5y = 42.5
5y ÷ 5 = 42.5 ÷ 5
y = 8.5
[tex]\frac{1}{3}: \frac{y}{26.4}[/tex]
y × 3 = 1 × 26.4
3y = 26.4
3y ÷ 3 = 26.4 ÷ 3
y = 8.8
8.8 > 8.5
The following data are monthly rents (in dollars) of studio and one-bedroom apartments in Harrisburg, Pennsylvania, in 2007, obtained from a random sample of such apartments advertised at rent.com in July 2007:
500, 549, 569, 575, 585, 600, 630, 680, 705, 790, 845
The mean of these eleven rent prices is $638.91 ,and the standard deviation is $105.93 .
1. Determine the standard error of the sample mean.
2. Describe what the population mean µmeans in this context.
3. Determine a 95% confidence interval for µ.
4. Write a sentence interpreting what this interval means.
5. Would you expect about 95% of the studio and one-bedroom apartments in Harrisburg in July 2007 to have a rent price within this interval? Explain.
Answer:
Part 1
SE= 31.94
Part2;
The population mean tells us that what would be the mean of all the monthly rents (in dollars) of studio and one-bedroom apartments in Harrisburg, Pennsylvania, in 2007.
Part 3:
576.31, 701.51
Part4:
This means that the 95%of the interval 576.31, 701.51 will have contain the value of the population parameter mean u.
Part 5:
Yes. out of 100 , 95 of the intervals will contain the true value of population mean u .
Step-by-step explanation:
Part 1
The standard error is calculated using the formula
SE = S/√n
where s is the standard deviation of the sample = $ 105.93
and n is the sample size= 11
Putting the values we get
SE= $ 105.93/ √11= 31.939
Part2;
The population mean tells us that what would be the mean of all the monthly rents (in dollars) of studio and one-bedroom apartments in Harrisburg, Pennsylvania, in 2007.
Part 3:
The z∝/2 value for 0.05 is ± 1.96
The 95 % confidence interval will be given by
x` ±z ∝/2 * s/√n
Putting the values
638.91 ± 1.96 * 31.94
638.91 ± 62.6006
576.31, 701.51
Part4:
This means that the 95%of the interval 576.31, 701.51 will have contain the value of the population parameter mean u.
Part 5:
Yes when the hypothesis testing is done and the sample mean is found to be equal to the population mean then it means that the population mean is to be found in this interval; 95% .
Or out of 100 , 95 of the intervals will contain the true value of population mean u.
This exercise involves the formula for the area of a circular sector. The area of a circle is 700 m2. Find the area of a sector of this circle that subtends a central angle of 3 rad.
Answer:
334.4 m²
Step-by-step explanation:
The formula for the area of a sector is given as:
1/2 × r² × θ
Where θ = Central angle
Area of a Circle = 700 m²
The formula for the area of a circle = πr²
r = Radius of a circle
r² = Area / π
r = √Area / π
r = √700/π
r = 14.927053304 m
Approximately, r = 14.93 m
Therefore, the area of the sector
= 1/2 × r² × θ
= 1/2 × 14.93² × 3 rad
= 334.35735 m²
Approximately, Area of the sector = 334.4 m²
ILL GIVE YOU BRAINLIEST IF YOU GET IT RIGHT AND EXPLAIN
Susie wants to paint the outside of her dollhouse, but she will need to buy a special type of acrylic paint. If each bottle of acrylic paints covers 25 square feet, how many bottles of acrylic paint will berbeded to paint the dollhouse? *
Answer:
4 bottles
Step-by-step explanation:
First u find the surface area of the pyramid
3.5 * 3 / 2 = 5.25
You multiply that by 4 since there are 4 sides
5.25 x 4 = 21
Then u find the area of the rectangle
3 * 4 = 12 per rectangle
12 * 5 (sides of the rectangle) = 60
add them together
60+21 = 81
81/25 = 3.24
round to the biggest next whole number
4
What is the slope of the line shown below?
10
O A. 2
5
(3,6)
OB. 4
O c. -4
-5
10
15
5
(1,-2)
-5
O D. 2
-10
Answer:
B
Step-by-step explanation:
Slope Formula
6 - (-2) / 3 - 1
8 / 2 = 4
The slope of the graph is 4.
Option B is the correct answer.
What is an equation of a line?The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
Example:
The slope of the line y = 2x + 3 is 2.
The slope of a line that passes through (1, 2) and (2, 3) is 1.
We have,
The coordinates from the graph are:
(1, -2), and (3, 6)
Now,
Slope.
= (6 -(-2)) / (3 - 1)
= (6 + 2) / 2
= 8/2
= 4
Thus,
The slope of the graph is 4.
Learn more about equation of a line here:
https://brainly.com/question/23087740
#SPJ5
I don’t know how to explain on why the student was incorrect
Answer:
the constant proportionality means the ratio between two directly proportional quantities.
so the constant proportionality will be 7.5÷6=1.25 or 10÷8=1.25 or 12.5÷10=1.25
constant proportionality should be same all through because it's a constant
find the smallest number that is exactly divisible by 144 192 and 168
Answer:
2 is your answer. hope helpful answer
There are 6 chef assistants and 2 servers. How many staff are working there?
Answer: 8
Step-by-step explanation:
are you in elementary school
Answer:
8 staff
Step-by-step explanation:
6 +2 = 8 There are 8 staff working there.
If this is done a different way explain or lmk? Hope you are having a wonderful day!! Of not it'll get better I promisee! <33 :))
This coordinate graph shows the initial and the final point of a running race held by a school. The initial point is indicated by a yellow dot and the final point is indicated by a red dot on the plane. In which quadrant did the race start and in what quadrant did it end?
A. Started in Quadrant III and ended in Quadrant I.
B. Started in Quadrant I and ended in Quadrant II.
C. Started in Quadrant II and ended in Quadrant III.
D. Started in Quadrant I and ended in Quadrant III.
Answer:
D
Step-by-step explanation:
you start with your positive variables, if they're both positive its quadrant 1, if the first number is negative and the second number is positive its quadrant 2, if both are negative its quadrant 3, and if the first one is positive and the second is negative it is quadrant 4
4) A piece of hematite contains 70%
iron. If the hematite weighed 60g,
how much iron would there be?
6) A survey of 250 trees in a small
Answer:
42g
Step-by-step explanation:
70% of 60 = 42
The results of a common standardized test used in psychology research is designed so that the population mean is 155 and the standard deviation is 40. A subject earns a score of 247. What is the z-score for this raw score
Answer: a carrot
Step-by-step explanation:
Any help to solve this one?
Answer:
Step-by-step explanation:
[tex]81^{1/2}[/tex]
[tex]3^4*{1/2}[/tex]
[tex]3^{4/2}[/tex]
[tex]3^{2}[/tex]
9
[tex]-16^{3/4}[/tex]
[tex](-2)^{4 *3/4}[/tex]
[tex](-2)^{12/4}[/tex]
[tex](-2)^{3}[/tex]
-8
In a Gallup poll, 1025 randomly selected adults were surveyed and 29% of them said that they used the Internet for shopping at least a few times a year. Find a 99% confidence interval estimate of the proportion of adults who use the Internet for shopping.
Answer: (0.25,0.33)
Step-by-step explanation:
A 99% confidence interval for population proportion is given by:-
[tex]\hat{p}\pm 2.576\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}[/tex], where [tex]\hat{p}[/tex] = sample proportion, [tex]n[/tex] = sample size.
Given: [tex]n=1025, \hat{p}=0.29[/tex]
A 99% confidence interval estimate of the proportion of adults who use the Internet for shopping:
[tex]0.29\pm 2.576\sqrt{\dfrac{0.29(1-0.29)}{1025}}\\\\=0.29\pm 2.576\sqrt{0.00020087804878}\\\\=0.29\pm2.576(0.01417)\\\\=0.29\pm0.03650192\\\\=(0.29-0.03650192,\ 0.29+0.03650192)\\\\=(0.25349808,\ 0.32650192)[/tex]
[tex]\approx(0.25,\ 0.33)[/tex]
Thus, a 99% confidence interval estimate of the proportion of adults who use the Internet for shopping = (0.25,0.33)
Find mZ3 if mZ5 = 145º and mZ4 = 45°
9514 1404 393
Answer:
C. 100°
Step-by-step explanation:
The exterior angle is equal to the sum of the remote interior angles.
∠5 = ∠3 +∠4
145° = ∠3 +45° . . . . fill in the given values
100° = ∠3 . . . . . . subtract 45° from both sides
Two letters from the word HAPPY are randomly chosen with replacement. What is the probability of choosing an H or P on either selection?
answer in decimal
Answer:
0.5 I believe
Step-by-step explanation:
Plz help me solve this
