Question

Use the matrix calculator to solve this linear system for cost per hour of each machine. 100x1 + 130x2 + 16x3 = 3,528 120x1 + 180x2 + 28x3 = 4,864 160x1 + 190x2 + 10x3 = 4,920 x1= x2= x3= c= d= operation:

Answer 1

Answer:

x1=10

x2=16

x3=28

Step-by-step explanation:

edge2020

Answer 2

Answer:

Step-by-step explanation:

Let find the matrix

$\left[\begin{array}{ccc}100&130&16|3528\\120&180&28|4864\\160&190&10|4920 \end{array}\right]$

so det A = -21600

Now, apply Cramer's rule to find x by replace the last column into the first column, you have $A_x$, and find $det_A_x$

$\left[\begin{array}{ccc}3528&130&16\\4864&180&24\\4920&190&10\end{array}\right]$

$det_A_x = -216000$

Crammer's rule allows you to find x from those determinants, it is $x= \frac{det A_x}{det A} = \frac{-216000}{-21600}=10$

you do the same with y and then z. I meant x_2, x_3