A sporting goods store sells tennis balls in boxes. Each box has 4 sleeves of tennis balls. Each sleeve has 3 tennis balls. The store sold 67 boxes on Saturday and 46 boxes on Sunday.
How many tennis balls did the store sell in all?

1356

Step-by-step explanation:

4x3=12

12x67=804

12x46=552

804+552=1356

Hope that helps :D

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

a and c

step-by-step explanation: