Answer:
Step-by-step explanation:
Your start amount is $80
And you’ll be adding 5 every week
Y=80+5x
Y is your total
x is the amount of weeks
4 gallons
If half covers an eighth, then you need half a total if 8 times. So multiply half by 8 and you get 4.
If this helped please mark branliest
Answer:
x²-8x-1=0
comparing above equation with ax²+bx+c=0
a=1
b=-8
c=-1
x=

=(--8+-√(64-4×1×-1)/2×1
=8+-√(64+4)/2
taking positive
x=(8+√68)/2=2(4+√17)/2=4+√17
taking negative
x=(8-√68)/2=2(4-√17)/2=4-√17