Hello!
Answer:
d=2r
Step-by-step explanation:
Simplify both sides and isolate the variable.
Hope this helps!
Distribute the 2 on the left to get 2e + 8 = 8e - 20
Add 20 to both sides and subtract 2e from both sides.
28 = 6e
Divide both sides by 6.
e = 14/3
Answer:

Step-by-step explanation:
Given


Required
Write the equivalent cosine function
The general formula is:

Where


Substitute
for amplitude in 


Substitute 3 for period in 

<em>Multiply both sides by b</em>

<em>Divide through by 3</em>

Hence;
becomes

Answer:
10.28425
Step-by-step explanation: