what the domain and the range of this equation?

a). f(x)=1/2x-4
b). 6x-9y=-18
c). 4x-y=4

You purchased 8 pounds 10 ounces of candy from a candy shop. you want to split it equally among 3 classrooms at a local school.

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the