Algebra: Evaluate- please help thanx?

3xz - 8y if x = 4 , y = -1 , and z = -2

2007-04-10 02:04:00 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

3xz - 8y =

3(4)(- 2) - 8(- 1) =

- 24 - (- 8) =

- 24 + 8 =

- 16

- - - - - - - -s-

2007-04-10 02:33:37 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋

Just substitute the values.
3(4)(-2) - 8(-1) = -24 + 8 = -16

2007-04-10 09:22:42 · answer #2 · answered by Dr D 7 · 0⤊ 0⤋

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