What is the area of the figure?

140

Step-by-step explanation:

so you will have to do 10 x 12 to get 120 and then 5 x 4= 20 and add then equal to 140

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the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

, 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