Answer:
The sample size 'n' = 26
Step-by-step explanation:
<u><em>Explanation</em></u>:-
Given a researcher wishes to estimate within $5 the average repair cost of for a refrigerator
Given estimate "E" = $5
<em>The estimate within the average is determined by</em>
<em> </em>
<em></em>
<em> Level of significance ∝ = 90 % or 10% </em>
<em> = 0.90 or o.10</em>
<em>Z₀.₁₀ = 1.645</em>


√n = 
Squaring on both sides , we get
n = 26
<u><em>Conclusion</em></u>:-
<em>The sample size 'n' = 26</em>
We need to see the rest of the question...
From the answer choices listed above the answer is b
Answer:
A) x² + 7x - 12 is NOT equivalent to the expression.
Step-by-step explanation:
1) expand by distributing terms.

2) Expand by distributing terms.

3) Collect like terms.

4) Simplify.

<em><u>The</u></em><em><u> </u></em><em><u>second</u></em><em><u> </u></em><em><u>equation</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>equivalent</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>equation</u></em><em><u>.</u></em><em><u> </u></em><em><u>but</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>first</u></em><em><u> </u></em><em><u>equation</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>not</u></em><em><u> </u></em><em><u>equivalent</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>m</u></em><em><u>a</u></em><em><u>i</u></em><em><u>n</u></em><em><u> </u></em><em><u>equation</u></em><em><u>.</u></em>
Answer:
3 - 12 = -9°C
So the temperature in the end of the days was -9°C