S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
The length of the garden box would be 10ft if the width is 6ft.
One ton = 2000 lbs
Therefore, 1.5 tons = 3000 lbs
3000-300=2700lbs
30% discount of £9.50 is £2.85
in order to find out the answer you times 30 by £9.50 and you get 285 and then you divide the answer by 100 and you get £2.85
