This is the correct answers
Answer:

Step-by-step explanation:
<em>Answer</em>
B) y = 3
<em>Step-by-step explanation</em>
Given the system of equations:

Isolating x from equation 1:

Substituting equation 3 into equation 2 and solving for y:

Answer:
70 hours
Step-by-step explanation:
3500 by 50 is 70