Posted by Jaida on Wednesday, February 25, 2009 at 10:49pm.
1) An exam will have 20 questions worth a total of 100 points. There will be TrueFalse questions worth 3 points each and short essay questions worth 11 points each. Several students ask how many essay questions there will be, but the teacher won't tell. How many essay questions will there be.

8th Grade Algebra  drwls, Wednesday, February 25, 2009 at 10:58pm
let x = number of truefalse questions
let y = number of essay questions
x + y = 20
3x + 11 y = 100
Solve those two equations. I assume you know how. Substitution is one way.

8th Grade Algebra  Jaida, Wednesday, February 25, 2009 at 11:15pm
I got 15 TF Questions
and 5 Essay Questions.
is that right ??

8th Grade Algebra  drwls, Wednesday, February 25, 2009 at 11:16pm
check: 45 + 55 = 100
Looks good!

8th Grade Algebra  Jaida, Wednesday, February 25, 2009 at 11:20pm
Thank You very mcuh.
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