Solve.In the first round of a game show, a contestant earned 80 points for each of x questions she answered correctly and lost 100 points for each of y questions she answered incorrectly. She then gained 100 points for each of z questions she answered correctly in the bonus round. Find in factored form the amount of points the contestant earned. 

A. 8(x - 10y + 10z) points
B. 2(4x - 5y + 5z) points
C. 20(4x - 5y + 5z) points
D. 20(4x - 10y + 10z) points


Answer: C

Mathematics

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