Michelle has a party and invites 3 friends. each of those friends invite three other friends. each of these friends invite three more friends. finally, each of these friends invite 3 more friends. each guest at the party brings 3 gifts, with three bows on each gift. how many bows did michelle get at the party?

a) 18
b) 729
c) 216
d) 81

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

c

step-by-step explanation:

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy