If the range of the function is f(x) = 5/x + 6.5 is {7, 6.83, 6.78, 6.75}, what is its domain?
A) {5, 10, 15, 20}
B) {10, 15, 18, 20}
C) {10, 15, 17, 20}
D) {10, 14, 16, 20}
E) {8, 15, 18, 22}

@agent0smith @nikato @Mertsj @julianassange

Question

If the range of the function is f(x) = 5/x + 6.5 is {7, 6.83, 6.78, 6.75}, what is its domain?
A) {5, 10, 15, 20}
B) {10, 15, 18, 20}
C) {10, 15, 17, 20}
D) {10, 14, 16, 20}
E) {8, 15, 18, 22}

@agent0smith @nikato @Mertsj @julianassange

mertsj · Answer

They have given you y values.  Those are f(x) values.  Replace f(x) with each of the given range values and solve for x.  Those x vales are the domain.

mertsj · Answer

I will illustrate with the first one.

mertsj · Answer

$$f(x)=\frac{5}{x}+6.5$$
$$7=\frac{5}{x}+6.5$$
$$.5=\frac{5}{x}$$
$$.5x=5$$
$$x=\frac{5}{.5}=10$$

mertsj · Answer

So one member of the domain is 10

mertsj · Answer

Find the others in the same way.

anonymous · Answer

Would the answer be B?

anonymous · Answer

@Mertsj

mertsj · Answer

That's what I got.

anonymous · Answer

Ty (:

anonymous · Answer

thanks for putting your question on here cx it helps alot because i have the same one