Answer:
Trapezoid
Step-by-step explanation:
Given quadrilateral has vertices at points A(-2,-1), B(3,13), C(15,5) and D(13,-11).
Find slopes of lines AD and BC:
Since the slopes are the same, lines AD and BC are parallel.
Find slopes of lines ABD and CD:
Since the slopes are different, lines AB and CD are not parallel.
This means quadrilateral ABCD is trapezoid (two opposite sides - parallel and two another opposite sides - not parallel)
So, 1/3 of something is 21.
1/3 of x is not the full x: we know that the x is 21 and even more. So, it must be bigger than 21, since it has 21 and something else (and since 21 is not negative): the solution MUST be greater than 21.
Quick answer -1/3
Longer answer, so the slope intercept format is y=mx+b where m is the slope and b is the y intercept. Thus we just look where m is and in this case it is -1/3
He would have earned $66 commission, I hope this helped
