If you were to use the substitution method to solve the following system, choose the new system of equations that would result if x was isolated in the second equation. 3x – 5y + z = 12 x + 6y – z = –4 2x – 5y – 2z = –8

subtract the first and last equation to cancel y . keep the z in one side and take others to the other side of equation . now substitute this equation instead z . now you have a equation just with x .

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What is the equation of the line that passes through the point (2, 3) and is perpendicular to the line y = –x – 3?

the slope of y=-1x-3 is -1 ok ? for a line perpendicular to it u should chose ur slope=-1(ex slope ) here slope = -1(-1)=1 the formula is y=mx+a substitute the slope with m and by plugging the point in the equation find a

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