20 points, please help

86

Step-by-step explanation:

The midsegment EF is half the sum of the parallel bases, that is

2x - 3 = = ( cross- multiply )

2(2x - 3) = 3x + 10

4x - 6 = 3x + 10 ( subtract 3x from both sides )

x - 6 = 10 ( add 6 to both sides )

x = 16

Thus BC = 3x - 13 = 3(16) - 13 = 48 - 13 = 35

Since EF is a midsegment then AE = EB = 5 and CF = FD = 9

perimeter = 5 + 5 + 35 + 9 + 9 + 23 = 86

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3