What is 1/2 times 1/2 times 2 times 12

6

Step-by-step explanation:

1/2 * 1/2 * 2 * 12 =

1/2 * 12 (because the 1/2 and 2 cancel out, as they form 1) =

6

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

this is answer of 144 cubic meters