Answer: ⇒ 
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Step-by-step explanation:
First you had to add by 2 from both sides of equation.

Simplify.

Then you had to subtract by 2x from both sides of equation.

Simplify.

Multiply by -1 from both sides of equation. (it's going to be reverse by the inequality).

Simplify it's should be the right answer.

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Answer:
What website is this on?
Step-by-step explanation:
Answer:
31 quarters
Step-by-step explanation:
Answer:
A sample of 499 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
The margin of error is given by:

In this question, we have that:

90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
How large a sample would be required in order to estimate the fraction of tenth graders reading at or below the eighth grade level at the 90% confidence level with an error of at most 0.03
We need a sample of n, which is found when
. So






Rounding up
A sample of 499 is needed.
Answer: <em>23.7</em>
Step-by-step explanation:
<em>Let's calculate the acute angle at the base of the triangle:</em>
<em>180° - 90° - 40° = 50°</em>
<em>Find side x:</em>
