(Algebra 1 Question)
A test has twenty questions worth 100 points. The test consists of x true-false questions worth 4 points each and y multiple choice questions worth 8 points each. How many of each type of question are on the test?

Question

retireed · Answer

You have two unknowns 

x true false  and Y multiple choice  So you need two equations to solve.

Can you give me one equation?

anonymous · Answer

I'm not sure I understand, but 4x+8y=100?

retireed · Answer

Very good!   The other is much easier to figure out.

retireed · Answer

It involves the total number of questions.

anonymous · Answer

I really dont think there is another one...

retireed · Answer

Yes there is,  think of the total number of questions.

anonymous · Answer

x+y=20?

anonymous · Answer

All i need here is the second equation because I can graph the rest

anonymous · Answer

I dont know how to find it

anonymous · Answer

4x+8y=20?

anonymous · Answer

actually that equation would make sense...

retireed · Answer

Now you have two equations which you can solve for  x or y.

anonymous · Answer

okay, thanks. I dont need to solve anything, they gave me a graph xD

anonymous · Answer

|dw:1451947497111:dw|

retireed · Answer

you found them both 

4x+8y=100  and x+ y = 20

retireed · Answer

You're welcome.