A student earns an 80% on their science test. If she got 20 questions correct, how many total were on the test?
1 answer:
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Answer:
(c) (3, 6)
Step-by-step explanation:
The only point that is on the line is (3, 6).
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I find a graphing calculator to be a useful tool.
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For solving this "by hand," you put the x- and y-values into the equation and check to see if it is true.
A. 2(0) +3(12) = 36 ≠ 24
B. 2(2) +3(9) = 31 ≠ 24
C. 2(3) +3(6) = 24 . . . . . a solution
D. 2(8) +3(0) = 16 ≠ 24
