Verified answer

You have to use grouping to express math in text.

The text √ symbol has no vinculum, so nobody knows if you mean

√(15) - x - 4

√(15 - x) - 4

or

√(15 - x - 4)

I'm going to guess you meant the 2nd, since the people who guessed you meant the 3rd gave answers that were not in the answer set.

so

f(-10) = √(15 - (-10)) - 4

          = √(25) - 4

          = 5 - 4

          = 1

♣♦

First things first, don't worry about the square root because that doesn't matter right now. Focus on the interior.

f(-10) would mean that we need to substitute -10 with X. So that would be:

15- (-10) -4

Simplified, it would be 25-4, which is 21.

Now that the inside is simplified, add the square root back in.

The answer is √ 21

you're scared by the notation..hahahaha pussay

you just plug in -10 where you see x. because it the f(x) and the f(-10) is relpacing the x.

F(-10)=√ 15-(-10)-4

f=√ 25-4

f=√ 21