Pl i need hel

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

x + 5y – 3z = –10

–5x + 6y – 5z = –21

–x + 8y – 8z = –25

Question 1 options:

(1,-1,2)

(-6,-5,2)

(-6,-2,-2)

no solution
Graph the region corresponding to the solution of the system of constraints.

f(x, y) = 3y + x
x ≥ 0
y ≥ –2
8x + 12y ≤ 92
11x + 7y ≤ 79
x + y ≥ 5

The customer price index(cpi), which measures the cost of a typical package of customer goods, was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely. use data points to find such a line and then estimate the requested quantities