Kathleen is ordering wraps from a local sandwich shop. The total charge includes a set delivery fee plus the price per wrap. Each wrap is the same price. Kathleen asks about specific orders and is given the following info:

Question

If she orders 20 wraps, the total cost will be $100
If she orders 25 wraps, the total cost will be $122.50

Write a linear equation in the form y=mx+b to represent y, the total cost of ordering x sandwiches. Explain how you know your answer is correct. I'M SO LOST ON THIS ONE PLEASE HELP ME

Answer 1

c = a + b x
or
100 = a + b(20)
122.5 = a + b(25)
--------------------
22.5 = 5 b
b = 4.5

100 = a + 4.5*20
a = 10

so
y = 4.5 x + 10
-----------------
now check
if 25 wraps
y = 4.5*25 + 10 = 122.5 sure enough

Answer 2

THANK YOU SM PLZ CHECK MY OTHER MATH PROBLEMS I REALLY NEED HELP W THOSE :(

Answer 3

There is a limit to how many people I can help at once.