You need to solve for x. This is how you do it:
subtract 9 to both sides
subtract 25 and 9
divide 2 to both sides
This is a very hard question but, i am a very hard man.
Answer:
f(x) = 5x
f(-1) = 5(-1)
f(x) = -5
answer: <em>f(x) = -5</em>
we can use the Pythagorean theorem to solve this:
a^2+b^2=c^2
plug in
3^2+6^2=c^2
9+36=c^2
add
45=c^2
take square root of both sides
sqrt45
this can be simplified down to 3 sqrt5
so the answer to this would be D