4. You have $40 in your wallet, but you do not want to spend all of it. You want to have at least some money left. You find a sh
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Answer:
282
Step-by-step explanation:
To find the sum of arithmetic sequence:
Find the first and last term.
nth term = 3n + 4
First term = a = 3*1 + 4
= 3 + 4
= 7
Last term = l = 3*12 + 4
= 36 + 4
= 40
Answer:
Step-by-step explanation:
