A survey of high school students shows that 30 out of 50 students work on weekends. If 1,250 students are surveyed, predict the number of high school students that work on weekends. 3

750 Students

Step-by-step explanation:

1. 1250 / 50 = 25

2. 30 * 25 = 750 Pupils.

Therefore out of the 1,250 Student's, 750 of them work on the weekends.

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

and?

step-by-step explanation: