Answer:


Step-by-step explanation:
Given


Required
The break even point
To do this, we make use of:


Collect Like Terms



Substitute 5 for x in 


Hence, the break even point is:


x^2+6x+8 factored is (x+4)(x+2)
Answer:
$4
Step-by-step explanation:
30+20=50
50-48=2
2+20+=22
22-18=4
if she has 30 then gets 20 she has 50. Then she spends 48 dollars leaving her with only 2 dollars. She then makes another 20 dollars so she now has 22 dollars. She spends 18 dollars leaving her with 4 dollars.
The root -2 leads to the factor (x+2). The other 2 factors are (x-5) and (x-6).
Then the poly is f(x) = (x+2)(x-5)(x-6).