You need to find out how much it costs to wash one car, so:
3×=13.50
Divide both sides by 3.
x=4.5 per car.
Now multiply 4.5 by 25 which should give you $112.50
Answer:
Step-by-step explanation:
<u>GIVEN:
</u>
To find the missing number in the proportion, you have to isolate it the term of x from one side of the equation.

First, thing you do is switch sides.

Multiply by 21 from both sides.

Solve.
Multiply the numbers from left to right.
Use the order of operations.
PEMDAS stands for:
- Parentheses
- Exponents
- Multiply
- Divide
- Add
- Subtract


- <u>Therefore, the final answer is x=24.</u>
I hope this helps. Let me know if you have any questions.
The slope of the line would be 3