Aline passes through the point (2,-2) and has a slope of 5/2

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?