Factoring Perfect Square Trinomials
a^2- 2ab + 4b

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.

Ihave trouble finding the nth term of a linear sequence

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?