A test has 20 question and is worth 100 points. The test consists of true or false questions worth 3 points each and multiple ch
oice questions worth 11 points each. How many multiple choice questions are on the test?
2 answers:
10 or 15 that is what I think
X=number of true or false
y=number of multiplule choice
total questions is 20
x+y=20
total poits is 100
3x+11y=100
eliminate x's
multiply first equaiton by -3 and add to 2nd
-3x-3y=-60
<u>3x+11y=100 +</u>
0x+8y=40
8y=40
divide both sides by 8
y=5
5 multipule choice questions
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