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3 years ago

The midpoint between y and 33 is -7. Find y

Mathematics

1 answer:

Basile [38]3 years ago

7 0

Answer:

y = -47

Step-by-step explanation:

To find the midpoint of two points, add them together and divide by 2

(y+33)/2 = -7

To find y, multiply each side by 2

(y+33)/2 *2 = -7*2

y+33 = -14

Subtract 33 from each side

y+33-33 = -14-33

y = -47

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dmitriy555 [2]

Answer:

x = - 4

8 = 2x + 16

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3 years ago

Read 2 more answers

A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is

nexus9112 [7]

Answer:

$z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933$

$p_v =2*P(z$

Step-by-step explanation:

Information given

n=370 represent the sample selected

$\hat p=0.4$ estimated proportion of readers owned a laptop

$p_o=0.45$ is the value that we want to test

z would represent the statistic

$p_v$ represent the p value

Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:

Null hypothesis: $p=0.45$

Alternative hypothesis: $p \neq 0.45$

The statistic is:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing we got:

$z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933$

Calculating the p value

We have a bilateral test so then the p value would be:

$p_v =2*P(z$

8 0

3 years ago

One year, the population of a city was 225,000. Several years later it was 236,250. Find the percent increase.

vampirchik [111]

Based on the information given the percentage increase is 5%.

<h3>Percentage increase</h3>

Using this formula

Percentage increase=Population several years later-Population for year/Population for one year×100%

Let plug in the formula

Percentage increase=236,360-225,000/225,000×100

Percentage increase=5%

Inconclusion the percentage increase is 5%.

Learn more about percentage increase here:brainly.com/question/11360390

4 0

3 years ago

mr.roxbury weighed 240 pounds when he started on a diet. over a one year period mr.roxbury lost 32% of his body weight. in the f

Annette [7]

Answer:

187.68

Step-by-step explanation:

240*.32=76.8

240-76.8=163.2

163.2*.15=24.48

163.2+24.48=187.68

3 0

3 years ago

Need help solving this

ira [324]

Answer:

x ≈ 41.6°

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan x = $\frac{opposite}{adjacent}$ = $\frac{JK}{KL}$ = $\frac{80}{90}$ = $\frac{8}{9}$ , then

x = $tan^{-1}$ ( $\frac{8}{9}$ ) ≈ 41.6° ( to the nearest tenth )

7 0

2 years ago