Levi paints faces at an annual carnival. His goal this year is to earn $100. He spends $15 on supplies and will work for 2.5 hours. How much will he need to earn in dollars per hour in order to reach his goal

He needs to earn $46 per hour in order to reach his goal

Step-by-step explanation:

Here, we are interested in knowing how much in dollars per hour is needed to be earned in order to reach the goal of $100

Let the amount to be earned be $x per hour

So the total amount earned in 2.5 hours will be 2.5 * $x = $2.5x

Now, this amount, minus the amount on supplies = the amount to be earned

Hence;

Mathematically;

2.5x - 15 = 100

2.5x = 100 + 15

2.5x = 115

x = 115/2.5

x = $46

is this part of a question or something

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