1.Mike buys an item with a price of $15 and uses a 10% off coupon. How much does he save by using this coupon?

14.31

Step-by-step explanation:

The car uses less gas

They use the same amount of gas after miles

Step-by-step explanation:

Given

The table represents the car mileage

--- The van

First, calculate the car's slope (m)

From the table, we have:

So, we have:

Calculate the equation using:

implies that for every mile traveled, the car uses 1/40 gallon of gas

Also:

--- The van

By comparison to:

This implies that for every mile traveled, the van uses 1/5 gallon of gas.

By comparison:

This means that the car uses less gas

Solving (b): Distance traveled for them to use the same amount of gas.

We have:

--- The van

--- The car

Equate both

Collect like terms

Take LCM

Solve for -7x

Solve for x