Welp, ya know the drill lol,

-3.8

Step-by-step explanation:

3 - 7 = -4

2/5 - 1/5 = 1/5 = 0.2

-4 + .2 = -3.8

b) k’(6, 4); l’(3, 3)

step-by-step explanation:

a 270° clockwise rotation maps every point (x, y) to (y, -x). (it negates the x-coordinate and then switches it and the y-coordinate.)

this means the endpoints of the side congruent to kl, k' and l', would be mapped as:

k'(-4, 6)→(6, 4)

l'(-3, 3)→(3, 3)