Answer:
The answer is A
Step-by-step explanation:
The identity property of addition simply states that when you add zero to any number, it equals the number itself.
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;
Answer:
Total distance Alicia run in kilometer = 8 Kilometer
Step-by-step explanation:
Given:
Total distance Alicia run = 5 miles
1 mile ≈ 1.6 kilometer
Find:
Total distance Alicia run in kilometer
Computation:
Total distance Alicia run in kilometer = 1.6 × 5
Total distance Alicia run in kilometer = 8 Kilometer
14+2x=4x: divide 2x on each side
14=2x: divide by 2
7=x
7
The right answer is A ! :)