Q. How many solutions does the system of equations below have?x+6y+8=02x+11=−12y(A) no solution(B) one solution(C) infinitely many solutions
Write Equations: Write down the system of equations:x+6y+8=02x+11=−12yAre the equations in the same form?No, the second equation needs to be rearranged to match the form of the first equation.
Rearrange Second Equation: Rearrange the second equation to match the form of the first equation:2x+11=−12yMove all terms involving variables to the left side and constants to the right side:2x+12y=−11Now the system of equations is:x+6y+8=02x+12y=−11
Compare Coefficients: Compare the coefficients of the two equations:The first equation has coefficients 1 for x and 6 for y.The second equation has coefficients 2 for x and 12 for y.Are the ratios of the coefficients of x and y the same in both equations?Yes, the ratio is x0 in the first equation and x1 in the second equation, which simplifies to x0.
Compare Constants: Since the ratios of the coefficients are the same, the lines are parallel or the same line. To determine which, compare the constants on the right side of the equations:The first equation has a constant of −8.The second equation has a constant of −11.Are the constants proportional to the coefficients of x and y?No, the constants are not proportional to the coefficients of x and y.
Determine Number of Solutions: Determine the number of solutions to the system of equations:Since the lines have the same ratios of coefficients but different constants, they are parallel and do not intersect.Therefore, the system of equations has no solution.
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