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3 years ago

Someone please help, I have a midterm and I have no idea what I’m doing ‍♀️

Mathematics

1 answer:

erica [24]3 years ago

3 0

Answer:

7% of 100 is 7 so 100 + 7 = 107

Step-by-step explanation:

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A yearbook company was investigating whether there is a significant difference between two states in the percents of high school

vovikov84 [41]

Answer:

Null hypothesis: $p_1 = p_2$

Alternative hypothesis: $p_1 \neq p_2$

So we need to conduct a:

D. A two-sample z-test for a difference in population proportions

Because the idea is to check if the population proportions in the states are similar or not.

Step-by-step explanation:

For this case they are trying two proof if there is a significant difference between two states in the percents of high school students who order yearbooks, and we chan check this with the difference of proportions.

Lets say that $p_1,p_2$ are the two proportions of interest and we want to check the following hypothesis:

We have the following info given:

$\hat p_1 = \frac{70}{150}= 0.47$ proportion of students that had ordered a yearbook from one state

$\hat p_2= \frac{65}{100}= 0.65$ proportion of students that had ordered a yearbook from another state

$n_1 = 150$ sample size from one state

$n_2=100$ sample size from another state

Null hypothesis: $p_1 = p_2$

Alternative hypothesis: $p_1 \neq p_2$

So we need to conduct a:

D. A two-sample z-test for a difference in population proportions

Because the idea is to check if the population proportions in the states are similar or not.

5 0

3 years ago

A wooden beam 24 feet long leans against a wall and makes an angle of 71° with the ground. How high up the wall does the beam re

qaws [65]

20 is the right answer because it loses 2 feet in the angle and goes two ffet back cause the angle

4 0

3 years ago

The equations in the triangle consist of (2x +1) and (5x +5)

Ainat [17]

2x + 1 + 5x + 5 + 90 = 180
7x + 96 = 180
7x = 180 - 96
7x = 84
x = 12

6 0

3 years ago

Zoom in to see the question plzzz help!!!

kondor19780726 [428]

Answer:

$\huge\boxed{\boxed{IV}}$

Step-by-step explanation:

Given:

x>0

Which means

x is any number greater than 0 ig 1,2,3,4,5,7,9.......

y<0

Which means

y Is any number smaller than 0

ig -1,-2,-3,-4,-5.........

So according to the question

The coordinates are

(x,-y)

Therefore,

The points are located to Quadrant IV

6 0

3 years ago

Write the frost ten terms of a sequence whose first term is -10 and whose common difference is -2

Temka [501]

Answer:

$-10,-12,-14,-16,-18,-20,-22,-24,-26,-28,...$

Step-by-step explanation:

we know that

In an Arithmetic Sequence the difference between one term and the next is a constant, called the common difference

The formula for an Arithmetic Sequence is equal to

$a_n=a_1+(n-1)d$

where

d is the common difference

n is the number of terms

a_1 is the first term of the sequence

In this problem we have

$a_1=-10\\d=-2$

substitute

$a_n=-10+(n-1)(-2)$

$a_n=-10-2n+2$

$a_n=-2n-8$

Find the first ten terms

$a_1=-10$

For n=2 ----> $a_2=-2(2)-8=-12$

For n=3 ----> $a_3=-2(3)-8=-14$

For n=4 ----> $a_4=-2(4)-8=-16$

For n=5 ----> $a_5=-2(5)-8=-18$

For n=6 ----> $a_6=-2(6)-8=-20$

For n=7 ----> $a_7=-2(7)-8=-22$

For n=8 ----> $a_8=-2(8)-8=-24$

For n=9 ----> $a_9=-2(9)-8=-26$

For n=10 ----> $a_1_0=-2(10)-8=-28$

The sequence is

$-10,-12,-14,-16,-18,-20,-22,-24,-26,-28,...$

5 0

3 years ago