# PRECALC QUESTION

Solve for "x" and "y" given the following matrix equation:
(2x, 0.5y, -2, 1) * (3, -2, 0, 1) = (-24, 19, -6, 5)

(the matrices are going from left to right, they're all 2x2's.)

1. 👍 0
2. 👎 0
3. 👁 49
asked by Aly
1. Multiply the matrices on the left-hand side and equate cell by cell with the right to get:
the equations
6x=-24
y/2-4x=19
Solve for x and y.
The two bottom cells turn out to be -6=-6 and 5=5.

1. 👍 0
2. 👎 0
2. 6 x +0 y = -24 so x = -4

-4 x + .5 y = 19 so y = 6

-6 + 0 = -6 true

(-2)(-2) + (1)(1) = 5 true

1. 👍 0
2. 👎 0
posted by Damon

## Similar Questions

1. ### math,algebra II

I have to work with these types of problems dealing with matrises can someone show me how to solve them.Heres one of them: Directions: Find the values of the variables in each equation in the first matrix it looks like this a+2

asked by jas on June 6, 2007
2. ### science

1 A ……... is a rectangular array of numbers that are enclosed within a bracket . horizontal set vertical matrix 2 When the numbers of rows is equal to the numbers of columns equal to 'n'. Where m=n. Then is

asked by sunday on March 15, 2014
3. ### Algebra II (Matrices)

My book doesn't solve it like a linear equation, they solve it by using inverse matrices. Solve the matrix equation: |4 -5||m|=|32| |1 2| |n|=|-5| A= |4 -5| |1 2| X= |m| |n| B= |32| |-5| Step 1. Find the inverse of the coefficient

asked by Jon on February 29, 2008
4. ### Algebra

2. Use an augmented matrix to solve the system. x + y = 5 3x – y = –1 (1 point) (1, 4) (1, 5) (3, –1)*** (5, –1) 3. When converting a system of linear equations into an augmented matrix, what equation form is needed? (1

asked by Student on January 21, 2019
5. ### Math

I have a few questions about T-Matrix. In excel, I am suppose to work with powered matrices to construct a weighted T matrix, using a scalar of .7. Does this mean I multiply each of the powered matrices by .7? Or do I power the

asked by Lisa on October 13, 2010
6. ### Pre-Calculus

Solve the equation 2x + 5y - 3z = -1. Write the general solution as a matrix equation. [x] [ ]  [y]= [ ] X [s] [z] [ ] [t] I'm supposed to fill in that blank in the middle, but I don't understand how to solve this if I'm only

asked by Ann on December 6, 2013
7. ### Maths: Algebra Matrices Class 12th

matrix{{0, 1, -1}, {2, 1, 3}, {1, 1, 1}} matrix{{1, -1, x}} matrix{{0}, {1}, {1}}=0 Find the value of x Don't give me the direct answer. Please tell me how to go about this. Draw in your notebook and then solve

asked by Akash on April 11, 2011
8. ### maths

2 . Put the following macroeconomic model into matrix format using Y, C and T as the variables and find the determinant of the matrix of coefficients. There is no need to solve the equations. Y = C + I C = a + b (Y – T) T = tY

asked by Asfand on November 30, 2016
9. ### Math

Hi! I need help with these two questions. Thanks! :) 1.) Can we multiply the Matrix A (which is 3 x 4 matrix) by the other matrix, Matrix B (which is 3 x 4 matrix)? True Or False? 2.) When we multiply the 6 x 3 matrix by the 3 x 1

asked by Emily on March 26, 2015
10. ### Algebra 2(check pt 4)

1)Cramer's Rule is used to solve the system of equations:3m-5n=12,4m+7n=-5 Which determinant represents the numerator for n? answer=[12 -5] [-5 7] 2)Cramer's Rule is used to solve the system of equations:3x-y+2z=17,4x+2y-3z=10,and

asked by erin on July 28, 2007
11. ### Augmented Matrix

Perform row operations on the augmented matrix as far as necessary to determine whether the system is independent, dependent, or inconsistent. DO ALL WORK BY HAND. x + 2y + 4z = 6 y + z = 1 x + 3y + 5z =10 If one subtracts the

asked by GetYourLeash on July 22, 2005

More Similar Questions