PLEASE HELP What is the equation of the directrix for the following parabola: -8(x-5)=(y+1)^2 a. y=-3
b. x=7
c. y=7
d. x=-3

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2