document.write( "Question 761894: express y in terms of x in the equation -3x+5y-11=0
\n" ); document.write( "Find the point where the line represented by the equation -3x+5y-11=0 cuts the y-axis.Hence check whether the point (3,4) is on the given line.
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Algebra.Com's Answer #463556 by ramkikk66(644)\"\" \"About 
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Given equation: \"-3%2Ax+%2B+5%2Ay+-+11+=+0\"\r
\n" ); document.write( "\n" ); document.write( "Problem 1: Express y in terms of x\r
\n" ); document.write( "\n" ); document.write( "Step 1: Bring y to side and x and constant terms to the other side of the equation
\n" ); document.write( "\"5%2Ay+=+3%2Ax+%2B+11\"\r
\n" ); document.write( "\n" ); document.write( "Step 2: Dividing both sides of step 1 by 5,
\n" ); document.write( "\"y+=+%283%2F5%29%2Ax+%2B+11%2F5\" ------> Equation (1)\r
\n" ); document.write( "\n" ); document.write( "The above equation expresses y in terms of x.\r
\n" ); document.write( "\n" ); document.write( "Problem 2: Where does the above equation cut the y axis.
\n" ); document.write( "For all points the y axis, x = 0. Substituting for x as 0 in the eqn (1)
\n" ); document.write( "\"y+=+11%2F5\"
\n" ); document.write( "So the line cuts the y axis at the point (0,11/5)\r
\n" ); document.write( "\n" ); document.write( "Problem 3: Is (3,4) on the given line
\n" ); document.write( "Solution: To check if (3,4) is on the line, we substitute x as 3 and y as 5 in the line's equation and see if it is true.\r
\n" ); document.write( "\n" ); document.write( "\"4+=+%283%2F5%29%2A3+%2B+11%2F5\" i.e.\r
\n" ); document.write( "\n" ); document.write( "\"4+=+9%2F5+%2B+11%2F5+=+20%2F5\" which is TRUE. So, (3.4) is a point on the given line.\r
\n" ); document.write( "\n" ); document.write( "See the graph for the line below.\r
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Solved by pluggable solver: DESCRIBE a linear EQUATION: slope, intercepts, etc
Equation \"0.6+x+%2B+-1+y+=+-2.2\" describes a sloping line. For any
\n" ); document.write( " equation ax+by+c = 0, slope is \"-a%2Fb+=+-0.6%2F-1\".
  • X intercept is found by setting y to 0: ax+by=c becomes ax=c. that means that x = c/a. -2.2/0.6 = -3.66666666666667.
  • Y intercept is found by setting x to 0: the equation becomes by=c, and therefore y = c/b. Y intercept is -2.2/-1 = 2.2.
  • Slope is -0.6/-1 = 0.6.
  • Equation in slope-intercept form: y=0.6*x+2.2.
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