Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

2x+y + 4z = 16
5x - 2y + 2z = -1
X + 2y - 32 = -9

A. (-1, 2, 22)
b. (-10, 22, 42)
c. (-1, 2, 4)
d (-10, 2, 22)

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

i got 142 as my answer

step-by-step explanation:

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.