Answer:
a) 31.25
b) 30
Step-by-step explanation:
The price function is given as:

Find:





Answer:
Step-by-step explanation:
first you have to see itis an arithmetic or geometric sequence.
then find common difference(for A.P) or common ratio (for G.P)
c.d .=an-an-1
c.r. =an/an-1
1.G.P.
2. A.P
3.G.P
3,5,25/3,125/9,...
c.r.=5/3
or (25/3)/5=25/(3*5)=5/3
or 125/9÷25/3=125/9×3/25=(125×3)/(9×25)=5/3
is simply the difference of both numbers of course, the price it was sold minus the price it was bought at.

If the 2nd person pays £52.20, then £52.20 = 3 (from the ratio).
52.20 / 3 = 17.40. 17.40 X 2 (from the ratio) = 34.80.
52.20 + 34.80 = 87.
The meal cost £87.00