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If (y=(m+1)x-6) and (y=7x+(m-10)) have the same (y)-intercept, what is (m)?

Answer and explanation

Correct answer: 4

In the form \(y=mx+c\), the y-intercept is the constant term \(c\). The first line has y-intercept \(-6\), while the second has y-intercept \(m-10\). For equal intercepts, \(m-10=-6\), so \(m=4\). If \(m=5\), the second intercept would be \(-5\), not \(-6\). Exam tip: put \(x=0\) to find a y-intercept.

Related tags

Y-InterceptLinear EquationsParameterCoordinate GeometryAlgebraSlope And Y InterceptIntroduction To PolynomialsMathematics

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