Find the missing side of the rectangle if the perimeter ?

length = 12x^2-30x

two width

=(30x^2-78x+12)-2(12x^2-30x)

=(30x^2-78x+12)-24x^2+30x

=6x^2-48x+12

one width

=(6x^2-48x+12)÷2

=3x^2-24x+6

what is the answer to this

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.