There are 30 questions on a math test. 5 points are awarded for each correct answer, and 2 points are deducted for each incorrect answer. Tom scored 122 points on the test. How many incorrect answers did Tom give?
Added by Jennifer L.
Step 1
We know that x + y = 30 (total number of questions) and 5x - 2y = 122 (total points scored). We can solve this system of equations to find the value of y. Show more…
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