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3 years ago

What is the sum of the arithmetic sequence 3,9,15, if there are 36 terms ...?

Mathematics

1 answer:

mezya [45]3 years ago

6 0

n = 36

a = 3

d = 3

(n/2) (2a + (n - 1)d)

(36/2) (2(3) + (36 - 1)3)

18(6+35(3))

18 x 111 = 1998

The sum is 1998

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What is the greatest common factor of 11,44?

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3 years ago

The sum of the three numbers in 2003,two of the numbers are 814 and 519 what is the third number

KonstantinChe [14]

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670

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3 years ago

Read 2 more answers

Find k. ..................

Nonamiya [84]

Answer:

k = -10

Explanation:

f(x) = 4x³ - 3kx² + 44x - 30

The divisor is:

(x - 2)

Set divisor to zero:

(x - 2) = 0

x = 2

Insert this into equation.

⇒ 4(2)³ - 3k(2)² + 44(2) - 30 = 210

⇒ 32 - 12k + 88 - 30 = 210

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⇒ -12k = 210 - 90

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6 0

2 years ago

Read 2 more answers

51% of the tickets sold at a school carnival were early-admission tickets. If the school sold 100 tickets in all, how many early

saul85 [17]

Answer:

51 were the total number of the tickets sold at a school carnival were early-admission tickets.

Step-by-step explanation:

Total number of tickets sold by = 100

Let $x$ be the early-admission tickets sold by the school.

As 51% of the tickets sold at a school carnival were early-admission tickets.

$x=\frac{51}{100}\times 100$

$= 51$

Therefore, 51 were the total number of the tickets sold at a school carnival were early-admission tickets.

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2 years ago