Question 5 (5 points)

Use an inverse matrix to solve the system of equations, if possible.

x + 5y - 3z=-10

-5x + 6y – 5z = -21

-x + 8y - 8z = -25

(1,-1,2)

(-6, -5,2)

(-6, -2,-2)

no solution

The solution of the system of equations is, (1,-1,2)

Step-by-step explanation:

Given system equation;

x + 5y - 3z = -10

-5x + 6y – 5z = -21

-x + 8y - 8z = -25

Matrix form is written as;

Cofactor;

Solution of the matrix:

Therefore, the correct option is (1,-1,2)

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40