Answer:
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.
