Question

Determine the domain of the function.
f(x)= sqrt of 9-x

Answer 1

domain , eh well
as the function is f(x) = Sqrt(9-x)
therefore
9-x >= 0
(otherwise it would be an imaginary number)
and solve the inequality
that will give
-x >=9
(multiplying by negative sign , and changing the inequality)
x <= -9
so domain is x belongs to (-infinity,-9]

Answer 2

so would it be all real numbers?

Answer 3

ohh x is less than or equal to -9?

Answer 4

YEs!

Answer 5

x ≤ 9

All real numbers except 9

All real numbers

x > 9

Answer 6

but those are my only options

Answer 7

there is no negative 9

Answer 8

oh i think i made a type during solving the inequality
9-x <=0
-x <=-9
(multiplying by negative sign)
x <= 9

Answer 9

thank you ! (: