50 times 30 is 1500 and 9 times 8 is 72 added is 1572
Answer:
336
Step-by-step explanation:
8P3
=8!(8-3)!
=8!5!
=8x7x6
=336
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.
4m - 3n = 8
Add 3n to both sides.
4m = 3n + 8
Divide both sides by 4.
m = 3/4n + 2
So, m = 3/4n + 2
However, if you made a typo, and meant 3m instead of 3n, your answer would be :
4m - 3n = 8
n = 8
~Hope I helped!~