At wet pets, a starter aquarium kit costs $15 plus $.60 per fish. At Gills and Frills, the same kit is $13 plus $.80 per fish. For what number of fish is the cost the same at the two stores?

C = 13 + 0.8f

Step-by-step explanation:

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