Volunteer drivers are needed to bring 80 students to the championship baseball game. drivers either have cars, which can seat 4 students, or vans, which can seat 6 students. the equation 4c + 6 = 80 describes the relationship between the number of cars c and number of vansv that can transport exactly 80 students. explain how you know that this graph represents this equation.

answer:

because the y-axis shows the vans so the y-intercept shows if there was only vans, they would need 13.   same with the cars which is the x-axis.   if there was no vans then there would have to be 20 cars.

step-by-step explanation:

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