Given the system of equations, what is the x-coordinate of the solution? (matrix)
y = 3 -1/2 x
3x + 4y = 1

22
-17/2
-11

Step-by-step explanation:

The given system of equations solved by matrix method is to arrange all coefficients into a matrix, and then making zeros in specific columns and rows, until we get an equation with just one variable.

In matrix arrangement:

Multiplying by 4 the first row and then subtracting with the second row, we have:

From the firs row, we find that:

Therefore, the right answer is -11.

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076