To rent a car, you must pay $0.30 per mile plus a maintenance fee of $35. write and equation to represent this function.

Let y be the total cost and x be the miles taken:

y = 0.30x + 35

35 is a fixed cost. No matter how many miles you drive the car you will still need to pay $35

.30 is a cost that depends on the miles taken (x).

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There are 15 more measles vaccines than polio vaccines

Step-by-step explanation:

Represent Polio with P and Measles with M

Given

5P + 3M = 225

P + M = 60

Required

How much is M greater than P; M - P

Make M the subject of formula in the second equation

Substitute this in the first equation

becomes

Open the bracket

Collect Like Terms

Divide both sides by 2

Substitute 22.5 for P in

Calculate the difference; M - P

Hence, there are 15 more measles vaccines than polio vaccines