1 )Liam wants to buy a basket ball. But he realizes half of his money from the 5 pound note fell on the street. He only has a 5 pound note left. How many money did he have to start off with?

He had to start of with 7.5 pounds

Step-by-step explanation:

We are given that Liam  realizes half of his money from the 5 pound note fell on the street.

So, His money fell on street =

His amount fell on street = 2.5 pounds

We are also given that He only has a 5 pound note left.

So, He had money initially = 5 pounds+2.5 pounds = 7.5 pounds

Hence He had to start of with 7.5 pounds

c

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for