Consider the function rule f(x)=9x- 7 . a. Find f(4) b. Find f(-2 ) . c. Show or explain how the equation 9x-7=65 can be solved using an “undoing process.” Report a solution to the equation.

Apair of ordinary dice is rolled. what is the probability that each die will show a number higher than 4. 1. (1/36) 2. (1/12) 3. (1/6) 4. (1/4) 5. (1/3)

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

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.