Evaluate The following expressions if X equals

Solve the system of equations. y= 2x y= x^2 - 15

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

Triangle abc has side lengths: ab = 3.5  cm, bc = 2.4 cm, and ac = 4.2 cmδabc ≅ δhjkwhat is the length of side hj?