PLEASE help it’s a multiple choice question i’ll mark u brainliest

Answers

Answer 1

Answer: I would choose b. You just have to look at the directions it’s going on both sides of the x-axis and describe what’s happening to the Y values. They seem to be opposite in this case.

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A sample survey contacted an SRS of 2854 registered voters shortly before the 2012 presidential election and asked respondents whom they planned to vote for. Election results show that 51% of registered voters voted for Barack Obama. We will see later that in this situation the proportion of the sample who planned to vote for Barack Obama (call this proportion V) has approximately the Normal distribution with mean μ 0.52 and standard deviation σ = 0.009. (a) If the respondents answer truthfully, what is P (0.5くV < 0.54)? This is the probability that the sample proportion v estimates the population proportion 0.52 within plus or minus 0.02. P (0.5<= V <=0.54) (±0.0001)= (b) In fact, 50% of the respondents said they planned to vote for Barack Obama V = 0.5. If respondents answer truthfully, What is P(V <=0.5)? P (V <=0.5) (±0.0001) =
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I need help with this problem
The formula for the length of the hypotenuse in a right triangle is squared a^2+b^2 where a and b are the lengths

Please help me solve x and z

Answers

Answer: Z = 107 as the opposite angles are equal. Then to find x, z is on the same line as (10x+3) so,

107+10x+3=180°

10x+3= 180-107

10x+3= 73°

now,

10x= 73-3 = 70

x= 70/10

x= 7

Hence z= 107 and x=7

pls mark brainliest

Answer:

$x=7\nz=107$

Step-by-step explanation:

First we can solve for x,

107 and 10x+3 is straight line which is 180 so make an equation:

$107+(10x+3)=180$

$10x +107+3=180$

$10x+110=180$

$10x=180-110$

$10x=70$

$x=70/10$

$x=7$

10(7) + 3 = 73

{CHECK: 107 + 10(7) + 3 = 180}

Now, let's find the value of z

As we have the value of x it will be easy to find z by forming an equation:

$z+73=180$

$z=180-73$

$z=107$

{CHECK: 107 + 73 = 180}

hope this helps :)

The planet Mars has a radius of 3400 km. What is the volume of Mars?Write your answer in scientific notation to three decimal places.

Answers

Answer:

1.646×10¹¹ km³.

Step-by-step explanation:

From the question given, we obtained the following information:

Radius (r) = 3400 km

Volume (V) =.?

The shape of a planet is spherical in nature. Thus, we shall apply the formula for calculating the volume of a sphere to obtain the volume of Planet Mar as illustrated below:

Radius (r) = 3400 km

Pi (π) = 3.14

Volume (V) =.?

Volume of a sphere = 4/3 πr³

V = 4/3 × 3.14 × (3400)³

V = 4/3 × 3.14 × 3.9304×10¹⁰

V = 1.646×10¹¹ km³

From the calculations made above, the volume of Planet Mar is 1.646×10¹¹ km³

There are 24 more students in the seventh grade class than the number g in the eighth grade class. The seventh grade class has 160 students. Write and solve an equation to find the number of students in the eighth grade class.

Answers

Answer:

y= 8th grade class,

y + 24 =160

subtract 24 from both sides

y=136

there are 136 students in the eight grade class

Step-by-step explanation:

Answer:

136 students

Step-by-step explanation:

7th grade= 160 students

8th grade= g students

g= 160-24

g= 136 students

- I hope this helps have a great day!

So i just learned multiplying negative number and i have to put them on a number line pls help here is the Qustion
-2 x 5 =
please explain

Answers

Answer:

-10

Step-by-step explanation:

Alright, let me explain negative multiplcation.

A negative number multiplied by another negative number becomes a positive number. But a negative number multiplied by a positive number is still negative. Every pair of 2 negatives become positive. This is important. Make sure to remember that.

That's it! If you need more help then reach out to your teacher. I'm sure that they will be more than happy to help!

Hope this helped! :)

Answer:

the awnswer is -10

Step-by-step explanation:

Remember a negative times a negative is the only time the answer will be positive. When a negative is multiplied by a positive it will always be negative.

ex:

-2 x 5

since this is a negative and a positive the answer will be negative. knowing that just multiply 2x5=10 then add the negative -10.

Below are the jersey numbers of 11 players randomly selected from a football team. Find the range, variance, and standard deviation for the given sample data. What do the results tell us? 33 29 97 56 26 78 83 74 65 47 58 Range = (Round to one decimal place as needed.) Sample standard deviations ? = (Round to one decimal place as needed) Sample variance = (Round to one decimal place as needed) What do the results tell us? a. Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless. b. Jersey numbers on a football team vary much more than expected c. The sample standard deviation is too large in comparison to the range. d. Jersey numbers on a football team do not vary as much as expected.

Answers

Answer:

Range = 71

Variance = 546.0

Standard Deviation = 23.4

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

Step-by-step explanation:

We are given the following data set in the question:

33, 29, 97, 56, 26, 78, 83, 74, 65, 47, 58

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle(646)/(11) = 58.7$

Sum of squares of differences = 5460.18

$\text{Variance} = (5460.18)/(11) = 546.0$

$S.D = \sqrt{(5460.18)/(10)} = 23.4$

Sorted Data Set: 26, 29, 33, 47, 56, 58, 65, 74, 78, 83, 97

Range = Maximum - Minimum

Range = 97 - 26 = 71

Based on the values, we can say that

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

(1 point) The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of Transportation. Recently, Southwest Air had the best rate with 80 % of its flights arriving on time. A test is conducted by randomly selecting 20 Southwest flights and observing whether they arrive on time.

Answers

Answer:

No. Southwest flights did not arrive on time.

Step-by-step explanation:

Please see attachment

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1) A 15 foot flagpole casts an 11 foot shadow. At the exact same time a 28 foot tree casts a shadow. Which proportion would correctly find the length of the tree's shadow? A) x 28 = 11 15 B) x 28 = 15 11 C) 28 x = 11 15 D) x 15 = 11 28

The sum of two consecutive integers is -39. List the two numbers from smallest to greatest

Pls help!!!!! i’m on a timer i’ll mark you brainliest!!!

Write an expression that is equivalent to (4x+3)+(-2x+4)