Counting sub-multisets 1. (a). how many solutions are there in nonnegative integers of a + b + c + d = 10?
(b). how many solutions are there in positive integers of a + b + c + d = 10?
(c). how many solutions are there in positive integers of a + b + c + d ? 10?
(d). how many solutions are there in positive even integers of a + b + c + d = 30?

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)

the answer is b to that quesiton

the answer to your question might be 45 degrees.

90+45=135

180-135=45