Which function has a vertex on the y-axis?
f(x) = (x - 2)2
f(x) = x(x + 2)
f(x) = (x − 2)(x + 2)
f(x) = (x + 1)(x - 2)

The following division is being performed using multiplication by the reciprocal find the missing numbers is 5/12 divided by x/3 equals 5/12 times x/10 equals 1/x

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

Solve the equation by completing the square. x^2+2x=17