Answer:
-5 + 6 = 1
Step-by-step explanation:
The model number may be used to simplify -5 + 6 = 1
Tell him to stop buying shoes, you wouldnt have this questions.
that would be 1/2 :P
We have:

Then we use trigonometric identities to change the negative sign of the trigonometric functions, so:

We clear f(x):

we simply what we can:

Thus, the correct answer is;
78+24+11+56+23+117+1
=310