For this case we propose a system of equations:
x: Variable that represents the amount of hours that Olivia's mother drove
y: Variable that represents the amount of hours that Olivia's father drove
So, we have:

From the first equation we have:

Substituting in the second equation:

Thus, Olivia's father drove 3 hours.

Olivia's mother drove 11 hours.
Answer:

First you convert the percentage into a decimal. 18% to 0.18, then you multiply that decimal to the price of the item being discounted and bam, you have your price.
I actually got zero for this when I did this in phothomath
Answer:
True
Step-by-step explanation:
It pases vertical line test but does not have an inverse