Circumference =

We know that the circumference in here is equal to 23000 miles.
23000 = pi x d
pi will be approximated to 3.14
23000 = 3.14d
divide both sides by 3.14 to get
about 7325 as the diameter
33 plus 4 is 37 and 10plus 1 is 12 so add that and get 49
Combine like terms (5y and -y= 4y) and the simplest form would be 4y+7
The final answer is B because you just add all three together. Hope you get it!
Answer:
t^2 + 30t - 15/t^2 + 25
Step-by-step explanation: