f' = -4x+8=0 => x=2
=> f(2) is the maximum = 11
Answer:
Step-by-step explanation:
b + n = 192
n = 5b
b + 5b = 192
6b = 192
b = 192/6
b = 32 <==== 5 beads per bracelet
n = 5(32)
n = 160 <==== 160 beads per necklace