document.write( "Question 1005462: I am having trouble with a set of questions on my daughters paper I'm helping her with. Could you please help me and explain it so I can teach it to her on how to solve it. Thank you. It says the two lines y=6x+15 and y=mx-4 intersect at x=-2. What is the y coordinate of their intersection point.....and what is the value of m. Please help me thank you for your time. \n" ); document.write( "

Algebra.Com's Answer #621720 by stanbon(75887) $\"\"$ $\"About$

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the two lines y=6x+15 and y=mx-4 intersect at x=-2. What is the y coordinate of their intersection point.....and what is the value of m?
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\n" ); document.write( "Wherever the equations intersect their y values are the same,
\n" ); document.write( "and their x values are the same.
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\n" ); document.write( "Since the y values are the same,
\n" ); document.write( "Solve:: 6x+15 = mx-4
\n" ); document.write( "Since x = -2 when the lines intersect, 6*-2+15 = m(-2)-4
\n" ); document.write( "-2m -4 = -12+15
\n" ); document.write( "-2m = 3+4
\n" ); document.write( "m = -7/2
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\n" ); document.write( "Find the y coordinate of the intersection point::
\n" ); document.write( "Since y = 6x+15
\n" ); document.write( "Solve:: y = 6(-2)+15 = -12+15 = 3
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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\n" ); document.write( "For the equation y \n" ); document.write( "

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