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Schach [20]
3 years ago
6

In order to win a quiz contest, Olga must score more than 400400400 points. She earns 121212 points for each right answer, and l

oses 444 points for each wrong answer. Write an inequality that represents the number of right answers (R)(R)left parenthesis, R, right parenthesis and wrong answers (W)(W)left parenthesis, W, right parenthesis Olga can give to win the contest.
Mathematics
1 answer:
blagie [28]3 years ago
4 0

Answer: The number of points added for r right answers is 12r. The number of points taken away for w wrong answers is 4w, so Olga's total points will be

... 12r -4w

To win, she needs this number to be more than 400. Your inequality is ...

... 12r -4w > 400

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y = mx + b

Where:

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According to the data of the statement we have the following points:

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We found the slope:

m = \frac {y_ {2} -y_ {1}} {x_ {2} -x_ {1}} = \frac {0 - (- 9)} {- 6 - (- 9)} = \frac { 9} {- 6 + 9} = \frac {9} {3} = 3

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We substitute one of the points and find b:

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y = 3x + 18

Answer:

y = 3x + 18

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