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8_murik_8 [283]
2 years ago
5

Find the sum of the first 30 multiples of 8.

Mathematics
1 answer:
Anna11 [10]2 years ago
3 0

Step-by-step explanation:

sum of the arithmetic sequence

a1 = 8

a2 = a1 + 8 = 8+8 = 16

...

an = 8×n

the sum of the first n elements of such a series is

n/2 × (2×a1 + (n - 1)×d]

with d being the difference between 2 consecutive elements (= the added constant).

so,

s30 = 30/2 × (2×8 + 29×8) = 15×(31×8) = 3720

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Solve the following system of equations by using the elimination method.
mariarad [96]

Answer:

the answer is (6, 1)

Step-by-step explanation:

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Answer:

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Step-by-step

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2 years ago
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2 years ago
A restaurant serves custom-made omelets, where guests select meat, cheese, and vegetables to be added to their omelet. There are
kondor19780726 [428]

Answer: The number of different combinations of 2 vegetables are possible = 15 .

Step-by-step explanation:

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5 0
3 years ago
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Andreas93 [3]

Answer:

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We do not use the approximate value of pi as the question demands us to leave pi unsolved.

7 0
3 years ago
Read 2 more answers
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