how do you solve x= 8-y if the domain is -2, -1, 2,3, and 5

Question

please explain to me how you even use domains i get confused at the beggining not the substitution part though.

Answer 1

The domain is all numbers that you can plug into x and get a real number, and range is the number you get,

since the equation is about finding the range (Y) ill change the format a little bit, it will be

Y = 8 - X , now apply the domains to the equation

# -2 as X,,,, Y = 8 -(-2) = 10  and its represented as (-2,10)

# -1 as X,,,, Y = 8 -(-1) = 9  and its represented as (-1,9)

# 2 as X,,,, Y = 8 - 2 = 6 and its represented as (2,6)

# 3 as X,,,,, Y = 8 - 3 = 5 and its represented as (3,5)

# 5 as X,,,, Y = 8 - 5 = 3 and its represented as (5,3)

 

i hope that was what you meant.