If the graph of y=x^2 is vertically stretched by the factor 3, reflected over the x-axis, translated left 7 and up 9, what would be the equation?
A) y= -3(x + 7)^2 +9
B) y= (3x + 7)^2 +9
C) y= 3(x + 7)^2 +9
D) y= (-3x + 7)^2 + 9

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

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.

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.