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Answer:
When we are given a flat fee and a rate, in this case $100 and $0.19 respectively, it means that the amount that we pay starts at $100, then increases by $0.19 per mile. As an equation, this can be written as:
Rental Fee = 0.19X + 100
Since X is the number of miles driven, we can solve for the cost of driving 50 miles by substituting it in for X in the equation:
Rental Fee = 0.19(50) + 100 = $109.50
The cost of a rental and driving for 50 miles is $109.50.