A woman invests $31,000, part at 8% and the rest at 9.5% annual interest. If the 9.5% investment provides $407.50 more income than the 8%investment, how much is invested at each rate?

it's

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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

do your own work and don"t cheat.

step-by-step explanation: