20 cos シ is your answer
Step-by-step explaination
2(-3) = -6, is the answer
X + (x+2) + (x+4) = 87
3x = 81
x = 27
So the longest side is 27+4 = 31
Answer:
n > -2
Step-by-step explanation:
5n > -10
n > -2
Answer: He should include 720 hard drives in his new sample.
Step-by-step explanation:
- Margin of error is inversely proportional to the square root of the sample size.
Let E be the margin of error and n be the sample size , then 4

Also, by equation of inverse variation , we have

Put
(given) , we get

Taking square on both sides , we get

Hence, he should include 720 hard drives in his new sample.