Step 1:

Observe the table:

Current Rate and Increased Rate,

Initial Charge .

Hourly Rate .

(a)

Find the expression showing the total cost to rent a bike at the current rate.

Let represents be number of hours.

Total cost to rent a bike at the current rate is .

Total cost to rent a bike at the increased rate is .

(b)

The cost to rent a bike for hours at the current rate and at the increased rate.

Substitute in the above equations.

Current and increased rate:

Increased rate:

(c)

Find the percent increase in the total cost to rent a bike for hours.

Substitute in the above formula.

Increased percentage is .

(d)

Find the number of hours he rented the bike.

Jerome paid or a bike rental at the current rate.

The equation is .

solve the equation.

Jerome rented the bike for hours.

Solution:

(a)

The expressions of the total cost to rent a bike at the current rate and increased rates are

.

(b) At hours Current rate is and Increased rate is .

(c) Increased percentage is .

(d) Jerome rented the bike for hours.