For all rational numbers, x+y+z is the same as which of the following? X + (y + 2)
A
B
x(yz)
C
(xy) + z
D
X(y + 2)

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

answ5

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