Answer:
(2.19 x 4) + (0.79 x 3)
Step-by-step explanation:
ok so u hv to take 2.19 and multiply it by four. Then take 0.79 and multiply it by three.
The left and right sides make up the parallel sides of the trapezoid. The top and bottom would be congruent but not parallel.
About 18 or 19 students per teacher
