The answer to this question is 5a^2-6a+20+(-175a+102)over(5a^2+6a-9)
The equation for Louis's purchase is: 
The equation for Kate's purchase is: 
The equation for Biff's purchase is: 
Step-by-step explanation:
First of all we have to define variables for each item involved in the purchase
Let x represent burger
y represent soda
z be the slice of pizza
Then
"Louis bought a burger and soda for $8"

"Kate purchased a slice of pizza and soda for $9"

"Biff purchased a burger, a slice of pizza and a soda for $13.50"

The equation for Louis's purchase is: 
The equation for Kate's purchase is: 
The equation for Biff's purchase is: 
Keywords: Linear Equations, Variables
Learn more about Linear equations at:
#LearnwithBrainly
Answer:
1) -120, -240, -360
2) 24 oz
Step-by-step explanation:
1) 24 * 5 = 120 , 24 * 10 = 240, 24 * 15 =360
5 years will be -120, 10 years will be -240, 15 years will be -360
2) 8 * 3 = 24 oz
I hope this helped, please mark Brainliest, thank you!!