Tina must select and answer in any order three of seven
seven essay questions on a test.
In how many ways can she do so?

Tina can select and answer the essay questions on her test in ways.
(Simplify your answer. Type an integer or a fraction.)

oof

step-by-step explanation:

8/k

step-by-step explanation:

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)