Louisa paid $12.25 for books at a yard sale. she spent $2.50 on a hardcover book, and the rest 13 softcover books. each of the softcover books cost the same. what was the cost of a single softcover book?

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

With number 11 ( show how you got the answer)