maths

posted by .

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

• maths -

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.

• maths -

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.

Similar Questions

1. 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: …
2. maths

solve the following pair of simultaneous equations. 2x-3y=13 3x+y=3
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.
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.
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.
6. 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.
7. 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.
8. Maths

Solve Graphically the following simultaneous linear equations 2y-3x=12 x+6=y
9. Maths

Solve Graphically the following simultaneous linear equations 5x+7y=13 7x+6y=3
10. Pre Calculas

7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3x-y=0 5x+2y=22 9. Solve the …

More Similar Questions