Alex drives from city A to city B at a rate of 60 kilometers per hour. If he uses 2 gallons of fuel every 50 miles, how many gallons of fuel will he need to drive five hours to visit his family in city B? (1 mile = 1.6 kilometers)

80%

step-by-step explanation:

answer: 40.95

step-by-step explanation:

nlgqer

step-by-step

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