Karen decides to use a random sample to determine her classmates' favorite
1 answer:
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I am old, so I like to use paper & pencil
Answer:
coefficent matrix
Step-by-step explanation:
P. 366
"If the column of constant terms is not included, the matrix reduces to that of the coefficent matrix of the system"
-1 -3 -1
9 -9 -1
-1 -3 4
Sorry my hand writing isn’t the best but here is the work for it and the answer would be (228in)
