Proof -
So, in the first part we'll verify by taking n = 1.



Therefore, it is true for the first part.
In the second part we will assume that,

and we will prove that,








<u>Henceforth, by </u><u>using </u><u>the </u><u>principle </u><u>of </u><u> mathematical induction 1²+2² +3²+....+n² = n(n+1)(2n+1)/ 6 for all positive integers n</u>.
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Answer:$3600 hope this helps
Step-by-step explanation:

Answer:
^^
Step-by-step explanation:
I just pressed 27/90 on the calculator hahahha
Average speed = total miles driven / total driving time
average speed = (150 + 100) / (3 + 1 1/2) =
250 / (4 1/2) =
250 / (9/2) =
250 * 2/9 =
500 / 9 = 55.55 mph