There are 140 students going on a field trip. a maximum of 22 students can fit on each bus how many buses will be needed for the field trip

Hello!

To find how many buses will be need for the field trip, divide the total students by the number of students that are allowed on each bus.

We are given that 140 students are going on a field trip, and a maximum of 22 students can only fit on one bus.

140 / 22 = 6.3636...

We are dealing with a real-life situation, so therefore, to go on this field trip, there will need to be 7 buses to fit all 140 students.

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