Question

The range of the function f(x)=x+5 is (7,9). What is the function's domain?
Is it
(2,4)
(-2,-4)
(12,14)
(-12,-14)
(0,5)

Answer 1

the range is the y value
we can rewrite the given function f(x)=x+5 to y=x+5
and our given range are y=7 and y=9
so sub in ur y values into the equation to find the x value which are the domain...
y=x+5

Answer 2

7=x+5 and 9=x+5
7-5=x and 9-5=x
? =x and ? =x