Answer:
A. y = 3 cos (1/2) x.
Step-by-step explanation:
The y-intercept is 3 so it will contain 3 cos x (because y = cos x passes through (0, 1).
The graph of 3 cos x has been stretched horizontally by a factor 2 ( 3 cos x would pass through (π/2, 0) whereas the given graph passes through (π, 0).
So the equation is 3 cos(1/2) x
Answer:

Step-by-step explanation:
<u>Step 1: Solve for d</u>
I am assuming that you are asking for me to solve for the variable d. Let me know if what I am doing is not what you want.




Answer: 
1st is 5. 2nd is 7. 3rd is 4. 4th is 3/5. 5th is 2. 6 is -1/4. 7is 5/6. 8 is 8/7