Solve the system of equations by transforming a matrix representing the system of equation into reduced row echelon form. 2x+y−3z=−19 x+2y+z=−4

x−y+5z=21

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

my answer is$ 12

step-by-step explanation:

because 15 -2=12

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2