they were selling pizza for $1.50 and hotdogs for $1.25. they sold 20 more slices of pizza than hotdogs, and for the sales totaled $173. how many slices of pizza did they sell?

Step-by-step explanation:

Cost of each item:

Number of each item:

Total cost:

Number of slices of pizza:

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

6 and 24

step-by-step explanation:

6 x 4 = 24