C= 20-0.75x
c= 20-0.75(9)
c= 20-6.75
c= 13.25
Here c is the amount of change and x is the number of books bought.
The customer's change will be $13.25
Answer:
Hello dude

so it's positive
HAVE A NİCE DAY
Step-by-step explanation:
GREETİNGS FROM TURKEY ツ
Answer at very bottom of picture above
if explanation need comment
Answer:

Step-by-step explanation:
Collect like terms and calculate the sum
5(24+4) Also 20(6+1)...................