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2 years ago

Use the Distributive Property to solve the problem. [Example: 4(6+3) = 4(6)+4(3) = 24 + 12 = 36] 7(10 + 3)

Mathematics

2 answers:

wariber [46]2 years ago

8 0

I got 91 also have a great day

riadik2000 [5.3K]2 years ago

5 0

Answer:

Step-by-step explanation:

7(10+3)

7(10)+7(3)

70+21

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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

2 years ago

576 bottles of water at the snack shop people bought 469 bottles of water how many bottles of water are there now

Vedmedyk [2.9K]

Subtract 469 from 576
576
-469
--------
107

6 0

2 years ago

Factor the following using GCF and show work. 6x^2+42x-18

aniked [119]

The greatest common factor is 6. Thus means we divide every part of the expression by 6.

6x^2/6 = x^2
42x/6 = 7x
-18/6 = -3

Your new expression is 6(x^2 + 7x -3).

8 0

2 years ago

Will an object with a density of. 97 g/ml float or sink in water explain

Ainat [17]

I would say the object will float because the density of water is 999.99kg/m which is slightly less than 1g but still more than the object.

3 0

2 years ago

What’s the x on this triangle ?

Dmitry [639]

Answer:

x = 5

Step-by-step explanation:

x is the length of the hypotenuse of this triangle. The length of one of the legs of the triangle is 3" and that of the other leg is 4".

Applying the Pythagorean Theorem: x^2 = 3^2 + 4^2, or 25

Thus, the length x is +√25, or 5.

x = 5

7 0

2 years ago