Answer:
25.13
Step-by-step explanation:
C=2πr=2·π·4≈25.13274cm
Answer:
4x equals 24 so x equals 6
Step-by-step explanation:
Answer:

Step-by-step explanation:

Answer:
n = 6
Step-by-step explanation:

Answer:
5x^2 + xy + 20
Step-by-step explanation:
Begin with 5x^2+3xy+12, Subtracting 2xy yields 5x^2 + xy + 12. Next, subtracting -8 yields 5x^2 + xy + 12 - (-8), or 5x^2 + xy + 20