Answer:
12
Step-by-step explanation:
It is the greatest commen factor
X - the rate charged by the first mechanic
y - the rate charged by the second mechanic
The sum of the two rates was $155.

The first mechanic worked for 10 hours, the second mechanic worked for 5 hours, and together they charged $1000.

Set 155-x and 200-2x equal to each other:

The rate charged by the first mechanic was $45, and the rate charged by the second mechanic was $110.
Answer: Is D
Step-by-step explanation:
I hope I am right if I'm not please correct me
Can you explain the question a bit more ??
I forgot how to solve these kind of question, I used to but all well.
But here is a calculator specifically for this kind of question
https://www.symbolab.com/solver/ellipse-equation-calculator