Question

You earn $35 for washing 7 cars.

1 How much do you earn for washing 4 cars?
You earn $ ___ for washing 4 cars.

2. You earn $45. How many cars did you wash?

Answer 1

1. $20

2. 9

Answer 2

[AI-generated answer — Explain Bot]

To answer question 1, we can set up a proportion to find out how much you earn for washing 4 cars.

Proportion: (Earnings for washing 7 cars) / 7 = (Earnings for washing 4 cars) / 4

Given that you earn $35 for washing 7 cars, we can substitute the values into the proportion:

(35) / 7 = (Earnings for washing 4 cars) / 4

Simplifying the equation, we have:

5 = (Earnings for washing 4 cars) / 4

To find the value of (Earnings for washing 4 cars), we can multiply both sides of the equation by 4:

4 * 5 = (Earnings for washing 4 cars)

Therefore, you earn $20 for washing 4 cars.

To answer question 2, we can set up a proportion to find out how many cars you washed if you earned $45.

Proportion: (Earnings for washing x cars) / x = $45 / 1

Given that each car you wash earns you $35, we can substitute the values into the proportion:

(35x) / x = $45 / 1

Simplifying the equation, we have:

35 = $45 / 1

To find the value of x (number of cars washed), we can multiply both sides of the equation by x:

35x = $45

Dividing both sides of the equation by 35, we have:

x = $45 / 35

Simplifying the right side of the equation, we get:

x = 1.2857

Since we cannot have a fractional value for the number of cars washed, we round down to the nearest whole number. Therefore, you washed 1 car to earn $45.