Question

Can someone help me with graphing equations?

Answer 1

Sure, what's your question?

Answer 2

Gavin and Seiji both worked hard over the summer. Together, they earned a total of $425. Gavin earned $25 more than Seiji. How much did each of them earn?
a. Write a system of two equations with two variables to model this problem.
b. Use substitution or the elimination method to solve the system.
c. Graph both equations.
d. Answer the question.

I have a and b figured out but c stumps me.

Answer 3

@iGreen

Answer 4

We can write this system of equations:

g + s = 425
g = s + 25

Where g is the money Gavin earned, and s is the money Seiji earned.

Answer 5

We can substitute s + 25 for 'g' in the 1st equation.

g + s = 425

s + 25 + s = 425

Add like terms(s + s):

2s + 25 = 425

Subtract 25 to both sides, what's 425 - 25?

Answer 6

@ClutzyMe21

Answer 7

well, see I figured out that s = 200 and g = 225. I just don't understand how to graph the equations I came up with, which are the equations that you came up with as well.

Answer 8

Just use this to graph it:

https://www.desmos.com/calculator

Then you can just take a printscreen.

Answer 9

But you should change g to x and s to y.

Answer 10

https://www.desmos.com/calculator/i9ybhev8ki

Answer 11

Oh my gosh! THANK YOU SO MUCH! I completely forgot about graphing calculators. Oh and thanks for the tip!!

Answer 12

No problem..your solution was (225, 200)..

Remember we changed:

g to x

s to y

Our x-term is 225, and our y-term is 200.

Which means Gavin made $225, and Seiji made $200.