Which equation is true if the perimeter of the rectangle is 60?
X + 5
3x - 2

X+5= 3x-2
(x+5)+(3x-2) = 60
2(x+5)+2(3x-2) = 60
O 2(3x-2)-2(x+5) = 60

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.