Enrique has a total of 71 flowers in his garden. all of the fowers were planted in 6 rows.
the first 5 rows have the same number of flowers per row, but the 6th row only has 6
flowers in it.
rows?
which equation can be used to find the number of fowers in each of the first 5
rows.
a. 5 x f + 6 =71
b. 5 x f - 6= 71
c. 6 x f + 6 =71
d. 6 x f= 71

7

step-by-step explanation:

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