Two cell phone companies have different rate plans. runfast has monthly charges $8 plus $8 per gig of
data. b a & d’s monthly charge is $15 plus $4 per gig of data. your task is to determine under what
circumstances each company has the better pricing. you will derive and solve a set of equations, graph
those equations, and evaluate the meanings for these events. don’t worry; i have a series of questions
to guide you through the process. good luck!
1. determine the equation for the monthly charges for runfast and ba& d. (2 points)
runfast=
ba& d=
2. use your mathematical skill to solve this system of equations using the substitution method. (4
points)
show your work here:

Part 1) The equation for the monthly charges for Runfast is and for BA&D is

Part 2) The solution of the system of equations is the point  (1.75.22)

Step-by-step explanation:

Let

x -----> the number of gig of data

y -----> the total monthly charges

we know that

Runfast Company

-----> equation A

BA&D Company

-----> equation B

Part 2) Use your mathematical skill to solve this system of equations using the substitution method

we have

-----> equation A

-----> equation B

Substitute equation B in equation A and solve for x

Find the value of y

so

The solution is the point (1.75.22)

That means

For the number of gig equal to 1.75 the monthly charge is equal to $22 in both company's

therefore

For a number of gigs less than 1.75 the company Runfast has the better pricing, while for a number of gigs greater than 1.75 the company BA&D has the better pricing

c

step-by-step explanation:

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5