Y=a(x-h)^2+k
is what vertex form look like. (h,k) is your vertex so in this problem your vertex would be (60,200)
F(n)=235-(235*.3^n)+50n is your equation where * is multiplication and ^ it to the power to.
3(x-9)
when you distribute the equation you get
3(x)-3(9) which is the last answer
Answer: 10 bags that weigh 2 lb.
5 bags that weigh 4 lb.
2.5 bags that weigh 8 lb.
Hope this helps.
Step-by-step explanation: