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.
The answer is a = -4 and b = 0.
We can solve this by looking at a system of equations using what was given
a + b = -4
a - b = -4
Then add then two equations together.
2a = -8 ---> then divide by 2 for your a value
a = -4
You can then put that into the equation and solve for b.
-4 + b = -4 ---> add 4 to both sides
b = 0
Answer and Step-by-step explanation:
X is equal to 51.
This is because the two sides of the triangle are congruent, so the base angles are congruent.
<em><u>#teamtrees #PAW (Plant And Water)</u></em>
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<em><u>I hope this helps!!!</u></em>
Answer:
2.59
Step-by-step explanation: