Answer:
73
Step-by-step explanation:
Bob
20-4=16
Billy 20+69=89
89-16=73
Answer:

Step-by-step explanation:
solving for dy/dx
multiply the equation out to remove parentheses

now differentiating in terms of x (
)

isolating dy/dx to one side



Number 1 is x=8!!
2 is pretty confusing so I hope someone else can answer two as I have answered 1!
Answer:
the answer is $110 i hope this helps but srry if it dont help
Step-by-step explanation: