B if you need an explanation just comment
Answer:
answer
Step-by-step explanation:
you have to subtract 3b from 3a so the answer is 0.
Answer:
2·x²+4
Step-by-step explanation:
The sum is an answer to an addition problem and 2 times a number means to multiply by 2. That number is squared so you it's to the second power.
Answer:
12742π Km
Step-by-step explanation:
The length of the rope is the circumference of the circle, that is
C = 2πr ( r is the radius ) Here r = 6371
C = 2π × 6371 = 12742π Km
