2.5kg of potatoes cost £1.40 work out the cost of 4.25kg of potatoes

The cost of 4.25 kg of potatoes will be £2.38

Step-by-step explanation:

This question will be solved by unitary method.first we calculate the cost of one kg potatoes then the cost of 4.25 kg potatoes.

Now let us solve the question

∵ 2.5 kg of potatoes cost is = £1.40

∴ 1 kg of potatoes cost will be = 1.40÷2.5

∴ 4.25 kg of potatoes will cost = ×4.25

                                                   =

                                                   = £2.38

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.