Answer:
=12x+y
Step-by-step explanation:
Combine like terms
=5x+-3y+7x+4y
=(5x+7x)+(-3y+4y)
=12x+y
Letter C. Is correct I think, hope this helped.
I set Jon an equation and solved for number of hours
-4/10+5/10
=5/10-4/10
=1/10
Answer:
after 6 years
Step-by-step explanation:
thats when the lines intersect, (6,300)