Answer:
-21b + 180 / 5
Step-by-step explanation:
Hey there!
b^3 - 21/5b + 9
= 3^3 - 21/5(3) + 9
= 27 - 63/5 + 9
= 72/5 + 9
= 117/5
Answer: 117/5
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
