Answer:
Ashanti and Landry will for 7 hours to wash 56 cars
Explanation:
* Lets explain how to solve the problem
- When to people work together to finish a job, we multiply the rate of
each by the time and add them,then equate the answer by the job
- Lets do that with Ashanti and Landry
- If Ashanti can wash 3 cars per hour
∴ The rate of Ashanti is 3 car per hour
- If Landry can wash 5 cars per hour
∴ The rate of Landry is 5 car per hour
- When they work together they will wash 56 cars
∵ They work together then they will work same amount of time
- Let the amount of time they will work is t
∵ Ashanti and Landry will work together for t hours to wash 56 cars
∴ 3t + 5t = 56
∴ 8t = 56
- Divide both sides by 8
∴ t = 7
∵ t represents the time they will work together
* Ashanti and Landry will for 7 hours to wash 56 cars