Rafael counted a total of 40 white cars and yellow cars. there were 9 times as many white cars as yellow cars. how many white cars did rafael count?

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi