Question

Dennis takes care of private swimming pools. He charges $50 to travel to a home and then $30 per hour. The equation t=50+30h models the total charge t for h hours of service. Find the ordered pair that presents 3 hours of work​

Answer 1

(3, 140)

Explanation:

If we have the equation
`t = 50 + 30h`, we can substitute the value 3 as
`h` to find the value of
`t`.

`t = 50 + 30(3)\\\\t = 50 + 90\\\\t = 140`

So we know that the total cost is $140.

To represent this as an ordered pair, we need to take note that the independent variable (x) is the one that we change to get the result (y).

We changed
`h` to get
`t`, so
`h` is the x and
`t` is the y.

So it's represented as (3, 140).

Hope this helped!