A group of 30 students from the 8th grade class charters a bus to an amusement park. The total amount they spend on the buss and admission to the park for each student is $1,770.
A group of 50 students from the 7th grade class also go to the amusement park, but they
require two buses. If the group from the 7th grade class spent $3,190 in total, how much does
it cost to charter one bus?
(1 Point)

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

answer is  

a.

5.2 inches

hope you get this right.

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