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

40 minutes

step-by-step explanation:

add the time and multiply by 2

step-by-step explanation:

in if you ask questions, the points are taken from your total and given to the one who answered it..

so if i have 30 points and i ask a question for 5 points, then when someone asks a question i will lose 5 points and the answerer earns 5

happy to

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true