8. A plumber worked ten hours at $15 per hour. How many hours does she have to work at $20 per hour in order to average $18 per hour?

Question

h represents: _____________________________________

Answer 1

h represents the number of hours the plumber has to work at $20 per hour.

Answer 2

8. A plumber worked ten hours at $15 per hour. How many hours does she have to work at $20 per hour in order to average $18 per hour?
What equation can be used to solve this problem

Answer 3

To solve this problem, we can use the equation for calculating average rate:

Average rate = Total earnings / Total hours worked

Let's set up the equation using the given information:

$18/hour = (total earnings at $15/hour + total earnings at $20/hour) / (10 hours + h hours)

Since we know the total earnings at $15/hour is $15/hour x 10 hours and the total earnings at $20/hour is $20/hour x h hours, the equation becomes:

$18/hour = ($15/hour x 10 hours + $20/hour x h hours) / (10 hours + h hours)

Now we can solve for h.

Answer 4

A plumber worked ten hours at $15 per hour. How many hours does she have to work at $20 per hour in order to average $18 per hour?

Answer 5

To solve this problem, we can set up an equation using the concept of average rate:

Average rate = Total earnings / Total hours worked

Let's use the given information to set up the equation:

$18/hour = (total earnings at $15/hour + total earnings at $20/hour) / (10 hours + h hours)

The total earnings at $15/hour is $15/hour x 10 hours = $150.

Let's substitute the values into the equation:

$18/hour = ($150 + $20/hour x h hours) / (10 hours + h hours)

Now, let's simplify the equation:

$18/hour = ($150 + $20h) / (10 + h)

To solve for h, we can cross-multiply:

$18/hour * (10 + h) = $150 + $20h

180 + 18h = 150 + 20h

Now, let's isolate the variable h:

18h - 20h = 150 - 180

-2h = -30

h = -30 / -2

h = 15

Therefore, the plumber needs to work 15 additional hours at $20 per hour in order to average $18 per hour.

Answer 6

15 * 10 + 20h / 10 + h = 18

Answer 7

Actually, there seems to be a mistake in your equation. The correct equation should be:

(150 + 20h) / (10 + h) = 18

Let me solve this equation for you.

First, let's cross multiply to eliminate the fraction:

18(10 + h) = 150 + 20h

180 + 18h = 150 + 20h

Next, let's simplify the equation by grouping the variables on one side:

18h - 20h = 150 - 180

-2h = -30

Finally, let's solve for h:

h = (-30) / (-2)

h = 15

Therefore, the plumber needs to work 15 additional hours at $20 per hour in order to average $18 per hour.