Posted by Annie on Sunday, February 7, 2010 at 12:22pm.
Your teacher is giving you a test worth 100 points containing 40 questions. There are twopoint and fourpoint questions on the test. How many of each type of question are on the test?
How would you set this up?

math  drwls, Sunday, February 7, 2010 at 12:32pm
Suppose there are x 2pointers and y 4pointers.
x + y = 40
2x + 4y = 100
If you are learning algebra, you probably know what to do next.
You could double both sides of the first equation and subtract what you get from the second equation, for example. That would give you 2y = 20 right away.

math  joe, Sunday, February 7, 2010 at 12:35pm
Ok you have to write a system of equations.
x+y=40
2x+4y=100
y=40x
2x+4(40x)=100
solve: X=30 Y=10
then 30+y = 40
y=10

math  Annie, Sunday, February 7, 2010 at 12:57pm
I totally understand now! i had the 2x+4y=100...i just was blanking out about how to set up the 2nd part but I see now! Thank you so much! :)

math  shaquille, Monday, October 24, 2011 at 8:00pm
what is the fraction lowes terms and a decimal 54

math  Muhammad Moiz, Wednesday, March 16, 2016 at 6:14pm
Xy=5
4x+6y=120
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