What is the value of 4(x − 2)(x – 3) + 7(x - 2)(x - 5) – 6(x − 3)(x - 5) when x = 5?
1 answer:
You might be interested in
Answer:
Ann would need 3 h to complete the remainder of the Job.
Step-by-step explanation:
Step 1.
The "speed" that each girl has to do the work is determined as:
- Tina:
, it means that Tina complete one twelveth of the job each hour.
- Ann:
, it means the Ann completes one eighth of the job each hour.
Step 2.
The amount of work done by Tina in 9 hours, is obtain multiplying by the "speed" calculated in step 1:
Amount of work done= . It means that <em>Tina completes two thirds of the work in 9 h.</em>
Step 3.
The remaining job is calculated as . It means that <em>still remains is one third of the job to be completed</em>.
Step 4.
The time required for Ann to complete the job is calculated dividing the remaining of the job by the "speed" of Ann to do the job.
. It means that <em>Ann would complete the job in another 3 hours</em>.