On the number line shown, $AE$ = 40 cm, $AD$ = 30 cm, $BE$ = 20 cm, and $C$ is the midpoint of $\overline{BD}$. In centimeters, what is $AC$?

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.