Answer:
Domain: x>= -3
Range: y <= -2
Step-by-step explanation:
Domain is all the x's on the graph or allowed in the equation.
Range is all the y's on the graph or able to come from the equation.
2x^2 + 2y^2 + 2xy I think
Total Cost in a day is

. Profit function is

. And the revenue function is

. In a day, bookstore must sell at least 15 books, because of 6n-90=0, in order to make profit.
18 would be the right answer
Answer:
The answer is "
"
Step-by-step explanation:
The whole question can be found in the file attached.

Subtracting the
from both sides of the equations:

