Use the table to write and solve an equation to find the number of cars c that a salesperson needs to sell in the fourth month so that
the salesperson’s mean number of cars sold per month is 10.
Month 1 2 3 4
Cars Sold 8 9 12 c

Step-by-step explanation:

Given

Required

What value of c makes the mean = 10

Mean is calculated as

In this case;

Mean = 10 and n = 4;

So, we have:

Multiply both sides by 4

Solve for c

no not all of them.

step-by-step explanation:

some of them have a square base.

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.