A group of 12 members and 8 nonmembers

$5.80

Step-by-step explanation:

The 12 members spent $48 in total and the 8 nonmembers spent 68 in total. If you add those two together and divide by 20 you get 5.8.

B

Step-by-step explanation:

because there are 12 members and 8 nonmembers so

12 × 4= 48 8 × 8.50= 68 68+48 =116 116 ÷ 20 =5.8 or $5.80

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step-by-step explanation:

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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)