All of the following proportions are equivalent except A.) a/b=c/d

B.) b/a=d/c

C.) a/d=c/b

D.)a/c=b/d

Three times the sum of a number and seven is negative thirty-six. what is the number?

Use the distance formula to find the distance between (-3,5) and (3,1)

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?