Answer:
Serina should have solved for x in the second equation because it has a coefficient of 1.
Step-by-step explanation:
we have
----> equation A
---> equation B
we know that
To solve the system of equations in the most efficient way, solve for x equation B and then substitute the value of x in equation A
so
----> equation C
substitute equation C in equation A

solve for y

Find the value of x
substitute the value of y in the equation C

The solution is (3,4)
therefore
Serina should have solved for x in the second equation because it has a coefficient of 1.
Yes because there are no constants after
C’(500)=80 means at 500 pounds of documents, the cost is increasing at a rate of $80 dollars/pound
Answer:
$18 for each carpet.
Step-by-step explanation:
This is how I did it.
Money Spent <u>288</u>
Amount of Carpets 16
288/16 = 18
$18 per carpet.