maths

solve the following simultaneous equations using matrices 3x-6y=24 and -4x+5y=-23

  1. 👍 0
  2. 👎 0
  3. 👁 48
asked by cecelia

  1. Assuming you know how to calculate a determinant, the answer is
    x = |24 -6| / |3 -6| = -18/-9 = 2
    ....|-23 5|/ |-4 5|
    You can get y by substitution of x=2 in either equation, or from a separate ratio of determinants.
    If you are not familiar with the notation, nor why I chose those numbers, nor how to calculate the determinants, then you need to review the subject. Your textbook should contain that information.

    1. 👍 0
    2. 👎 0
    posted by drwls

  2. Those are supposed to be square 2 x 2 matrices in numerator and denominator of my previous answer. It is hard to get the type spacing right to align the top and bottom halves. The | | symbols denote the determinant of the matrix.

    1. 👍 0
    2. 👎 0
    posted by drwls

Respond to this Question

First Name

Your Response

Similar Questions

  1. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by Samara on July 20, 2012

  2. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by INDIANA on July 12, 2012

  3. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by SAMARA on July 16, 2012

  4. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by INDIANA on July 11, 2012

  5. Mathematics

    write the following simultaneous equations in the form of AX= B where A,X and B are matrices 11x+6y=6 9x+5y=7 hence write the solution for x and y as a product of two matrices.

    asked by INDIANA on July 10, 2012

  6. math

    solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations 3x-y=-4 2x-y=0

    asked by Lauren on October 16, 2010

  7. Engineering

    I need help solving the following simultaneous equations, for the values of Vo and a: 1.4 = Vo e^-32a 4 = Vo e^-6a I've never come across simultaneous equations like this (e is the base of natural logarithms, so perhaps taking

    asked by Stuart on May 13, 2007

  8. maths pls help

    1. Solve the following simultaneous equations: log2 xy = 7 log2 (x^2/y) = 5 2. If log y x =a and log z x=b where x is not equal to 1, express the following in terms of a and b: logy (yz) Solve the following simultaneous equations:

    asked by Claire on November 21, 2007

  9. math

    how do i solve two step equations? Do you mean two equations in two unknowns? The method of substitution is one way. There is a good tutorial here: http://www.themathpage.com/alg/simultaneous-equations.htm

    asked by megan on January 18, 2007

  10. Math

    A particular Chemistry book costs $6 less than a particular Physics book. Two such Chemistry books and three such Physics books cost a total of $123. Construct two simultaneous equations and solve them using the substitution

    asked by anonymous on February 23, 2018

More Similar Questions