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1 year ago

What is (7x-10y)-(8x-7y) subtract binomials

Mathematics

2 answers:

astra-53 [7]1 year ago

6 0

Answer:

(-x-3y)

Step-by-step explanation:

I look at subtraction of binomials like its a regular subtraction problem
in this case, we should re-write the equation as so

user100 [1]1 year ago

5 0

Answer:

where the boys are verbs

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2 years ago

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Scientists predict that there is a 0.8 chance that there will be an earthquake in San Francisco this year. How likely is that th

Firlakuza [10]

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80%

Step-by-step explanation:

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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

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3 years ago

24 is 4/5% of what number

docker41 [41]

Answer:

The number is 3000

Step-by-step explanation:

Is means equals

24 = 4/5 % *n

Lets change the percent to a decimal. To change percent, we move the decimal to places to the left.

4/5= .8

4/5 % = .8% = .008

24 = .008 *n

Divide each side by .008

24/.008 = .008n/.008

3000 = n

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3 years ago

What is the answer to this math problem

Vilka [71]

Answer:

V = 288 m^3

Step-by-step explanation:

The formula for volume of a rectangular prism is

V= l*w*h

V = 4*8*9

V = 288 m^3

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3 years ago

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