What is the domain of the function
f(x) = -3(x + 2)(x - 2)

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.