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If (c=-18) and (m-c=31) in (y=mx+c), what is the slope?

Answer and explanation

Correct answer: 13

Given c=-18 and m-c=31, we get m-(-18)=31, or m+18=31. Hence, m=13. Therefore, the slope is 13. If m were 12, then m-c=12-(-18)=30, not 31. Exam tip: subtracting a negative number is the same as adding it.

Related tags

SlopeY-InterceptLinear EquationAlgebraic SubstitutionCoordinate GeometrySlope And Y InterceptIntroduction To PolynomialsMathematics

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