Question

help please!

Answer 1

The phone company A Fee and Fee has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone. If a customer uses 190 minutes, the monthly cost will be $94.5. If the customer uses 530 minutes, the monthly cost will be $213.5.

A) Find an equation in the form y = m x + b, where x is the number of monthly minutes used and y is the total monthly of the A Fee and Fee plan.

Answer: y=

Answer 2

y=mx+b
94.5=m190+b
213.5=m530+b

Answer 3

solve the 2 equations 2 unknown and 2 equations

Answer 4

it doesn't say solve it says find an equation

Answer 5

i need the equation in order to solve the second part which is B) Use your equation to find the total monthly cost if 683 minutes are used.

Answer 6

to find the equation you need to solve these equation to find m and b

Answer 7

solve first equation for b then put in equation 2

Answer 8

i don't know how

Answer 9

94.5=m190+b => b = 94.5-m190

Answer 10

then
213.5=m530+b
231.5=m530+(94.5-m190)
solve for m

Answer 11

can you give me the equation and i'll do part b this is just an example so i can see how to do it

Answer 12

231.5=m530+94.5-m190
231.5-94,5=m530-m190
137=m340 =>m=137/340

Answer 13

so y=137/340x+?

Answer 14

*213.5-94.5=m530=m190
119=m340

Answer 15

whattt im so confusedd

Answer 16

whats the equation??

Answer 17

you know we have 2 equations
94.5=m190+b
213.5=m530+b

Answer 18

i need one equation y=mx+b form

Answer 19

We know, but you have the use the information given to you to find the equation.

Answer 20

rate is missing and the fee

Answer 21

i am using them

Answer 22

can someone please show me the steps with the equation so i can understand

Answer 23

b is the fee
m is the rate
these 2 are not given

Answer 24

94.5=m190+b
213.5=m530+b
This is setup. You solve for one variable then plug in that one to find the other. Once you have m and b you can plug m and b into y =mx + b

Answer 25

b=-190m+94.5

Answer 26

94.5=m190+b
213.5=m530+b

b = 94.5 - m190 then plug this into the second equation
213.5 = m530 + 94.5 -m190
213.5 = m340 + 94.5
(213.5 - 94.5)/340 = m
0.35 which is 7/20. So m =7/20
Now plug in m into either equation find b then once you have m and b you can substitute those values into y =mx + b

Answer 27

y=7/20x+28

Answer 28

Yup. That is correct.

Answer 29

B) Use your equation to find the total monthly cost if 683 minutes are used.

Answer 30

so, y=7/20(683)+28

Answer 31

267.05