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3 years ago

Help a girl outttt Pleaseeee

Mathematics

1 answer:

Tomtit [17]3 years ago

5 0

$⟹3x+5 = -x-7$

$⟹3x+x=-7-5$

$⟹4x=-12$

$⟹3-5x=-9+x$

$⟹3+9=x+5x$

$⟹12=6x$

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Please help, will give brainliest!!

Kisachek [45]

Answer:

The answer is A.

Step-by-step explanation:

Hope this helped have an amazing day!

7 0

3 years ago

2(x-3)=2x-6 is an example of which property

Jlenok [28]

2(x-3)=2x-6 This is distributive property.

2(x-3)= 2x - 2*3 = 2x-6

7 0

3 years ago

A group of researchers wants to know whether men are more likely than women to contract a novel coronavirus. They surveyed two r

olasank [31]

Answer:

Test statistic Z= 0.13008 < 1.96 at 0.10 level of significance

null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Step-by-step explanation:

<em>Step(I)</em>:-

Given surveyed two random samples of 390 men and 360 women who were tested

first sample proportion

$p_{1} = \frac{360}{390} = 0.9230$

second sample proportion

$p_{2} = \frac{47}{52} = 0.9038$

Step(ii):-

Null hypothesis : H₀ : There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Alternative Hypothesis:-

There is difference between proportion of positive tests among men is different from the proportion of positive tests among women

$Z = \frac{p_{1}- p_{2} }{\sqrt{PQ(\frac{1}{n_{1} }+\frac{1}{n_{2} } } }$

where

$P = \frac{n_{1}p_{1} +n_{2} p_{2} }{n_{1}+n_{2} }$

P = 0.920

$Z= \frac{0.9230-0.9038}{\sqrt{0.920 X0.08(\frac{1}{390}+\frac{1}{52} } )}$

Test statistic Z = 0.13008

Level of significance = 0.10

The critical value Z₀.₁₀ = 1.645

Test statistic Z=0.13008 < 1.645 at 0.1 level of significance

Null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

7 0

3 years ago

Need help please, I dont

aivan3 [116]

Answer:

The last answer

Step-by-step explanation:

Intigers are whole numbers

3 0

3 years ago

Read 2 more answers

Solve d over r equals t for r

lana66690 [7]

D/r=t
d=tr
d/t=r

so r=d/t

7 0

3 years ago