Although the question is incomplete, I have seen it before.
The equations are:
3a + 6b = 12
-3a + 6b = -12
Adding the equations, we get:
12b = 0
And b = 0
Area of rect. = 5 x 7 = 35
area of triangle = 1/2(2)(7) = 7
area of figure = 35 + 7 = 42
answer
42 <span>units²</span>
18 x 4 = 72
(9 x 2) x 4 = 72
9 x (2 x 4) = 72
You divide 29:11= 2 7/11
so you have 2 full vans and one with 7 students.
so the answer is 7
