Which property do these belong to; the commutative property, the distributive property, and the associative property?
a - 3x25=(3 x 30)+(3 x 5)= 75
b- 15 x (2 x 4) = (15 x 2) x 4 = 120
c - 30 + 5.2 + 7 = 7+5.2 + 3- = 42.2
d- 5 x 13 = (5 x 10) + (5 x 3) = 65

What is 32+4 x (16 x 1/2) -2 show your work}

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103