At a sale, you purchased a $20 scarf for $15. What
was the percent of change?

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

answer: what is the question you're trying to ask?

step-by-step explanation: