4 years ago

Find the solution to the following system using substitution or elimination:

Mathematics

1 answer:

Licemer1 [7]4 years ago

3 0

Answer:x=1

Step-by-step explanation:

y=y

y = -x + 10

y = 7x + 2

-x+10=7x+2

10=8x+2

8=8x

x=1

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Answer: 13

Step-by-step explanation:

If the prior population proportion is unavailable then the formula to find the sample size is given by :-

$n=0.25(\dfrac{z^*}{E})^2$

, where z* = Critical z-value

E = margin of error

Let p be the proportion of Americans who support the gun control in 2018.

As per given , we have

Confidence level = 99%

The critical z-value for 99% confidence interval is 2.576 ( BY z-table)

Margin of error : E= 0.36

Since there no prior information about the proportion of Americans who support the gun control in 2018.

So , the required sample size to estimate 99% confidence interval would be:

$n=0.25(\dfrac{2.576}{0.36})^2=0.25(7.16)^2$

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Hence, 13 Americans should be surveyed.

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Answer:

5p+4>14 (A)

Step-by-step explanation:

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Answer:

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Answer:

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Step-by-step explanation:

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