Answer:

Step-by-step explanation:
Multiply (x + 1) by (2x + 2).
x × 2x is 
x × 2 is 2x
1 × 2x is 2x
1 × 2 is 2
+ 2x + 2x + 2 = 
P = -Q + 2518 = -Q + 2518-25 = -Q-7 = -Q-7/-1 = -Q/-1Q = 7
Therefore, the store can expect to sell 7 new books if they will charge $18 for the new books.
Answer:
you would have to use repletion
Step-by-step explanation:
2x^2+5x+7=20
-7 -7
2x^2+5x=13
/5 /5
2x^2+x=2.6
4+2x=2.6
-4 -4
2x=-1.4
/2 /2
x=-0.7
It does not equal 22? It equals 2 because 1+1 is 2, basic math.