Solve the problem and show your work. explain how you solved the problem using first, next, and last. what is 50% of 18? a) show work: b)

Well to solve this, there is a very easy way of doing it.

you can divide 18 divided by 2 which equals 9

so the 50% of 18 is 9

a way to check this if it's true is to do 9+9=18

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

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