If gas is $2.50 per gallon, and John drives a car that goes 20 miles per gallon, how much gas would it cost if John drove 60 miles?

7.50

Step-by-step explanation: 20 can go into 60 3 times so 2.50X3 =7.50

21 i watched a 3 hr vid explaining it

step-by-step explanation:

du what else would it be

brainliest

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