Ronnie's Rentals charges $25 plus $15 per to rent a chain saw for 5 hours. Write an expression to show how you could calculate the total amount David paid. (Its question 12); )

The expression of total amount David paid is

y=25 + 15x

where y represents total amount in dollar, x is time in hour.

The total amount that David paid is $100.

Step-by-step explanation:

Given that,

Ronnie's Rentals charges $25 plus $15 per hour to rent a chain for 5 years.

Let

Ronnie's rents a chain for x hours.

Given that,

Rental charge of a chain for 1 hour is $15

Rental charge of a chain for 2 hour is $ (15+15) = $30 = $ (2*15)

Rental charge of a chain for 3 hour is $ (15+15+15) = $45 = $ (3*15)

From the above we conclude that,

∴Rental charge = Time * $15

Rental charge of a chain for x hour is = $ (x. 15) = $15x

The expression of total amount David paid is

y=25 + 15x

where y represents total amount in dollar, x is time in hour.

Now plugging x = 5 in the above expression

y = 25 + (15*5)

=$100

The total amount that David paid is $100.