A principal orders t-shirts and wants to check some of them to make sure they were printed properly, randomly selects 7 of the 10 boxes and checks 20 in one box and 40 in others. What type of sampling is this?
(It's not random)

answer: plz put a pic in so i can answer it

step-by-step explanation:

here is a big fat

i agree because i see the other persons thinking is clear

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)