A12 foot-ladder is resting against a wall. the base of the ladder is 2.5 feet from the base of the wall. how high up the wall will the ladder reach?

Which of the binomials below is a factor of this trinominal? x^2-13+30

What kind of bond pays interest which is exempt from tax?

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?