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4 years ago

Find S12 for the series 2 + 5 + 8 +...

2 answers:

7 0

Hi, I'm pretty sure by S12 you mean the sum of all the 12 terms in the series 2 + 5 + 8 + .....

Then, first you find the pattern:
5 -2 = 3
8 -5 = 3
This is an arithmetic series with a common difference of 3. Next, we find the last term, or the 12th term.

A12 = A1 + (n - 1)d
A12 = 2 + (12 - 1)3
A12 = 35

Since, we know the first and last terms of the series, we could find the sum by this formula:

S = (n/2)*(A1 + A12)
S = (12/2) * (2 + 35)
S = 222

The answer is 222.

olga55 [171]4 years ago

4 0

2+5+8+11+14+17+20+23+26+29+32+35

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3 years ago

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3 years ago

Hi can u plzz help me with these thank you!!!

julsineya [31]

Answer:

$Radius = 5ft$

$Circumference = 31.4\ ft$

$Perimeter = 25.12\ ft$

Step-by-step explanation:

Solving (1):

Given

$Diameter = 10ft$

Required

Determine the radius and circumference

Radius is calculated as follows:

$Radius = \frac{1}{2} * Diameter$

$Radius = \frac{1}{2} * 10ft$

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$Circumference = 2 * \pi * Radius$

$Circumference = 2 * 3.14 * 5ft$

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Solving (2):

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4 0

3 years ago

Simplify.

Dominik [7]

Simplify: [{y^(2/7)}/{y^(1/2)}]

Since, [{a^(p/q)}/{a^(r/s)}] = a^{(p/q)-(r/s)}

Where,

a = p
p/q = 2/7 and
r/s = 1/2

so,

= y^{(2/7)-(1/2)}

Take the LCM of denominator i.e.,2 & 7 is 14.

= y^{(2*2 - 1*7)/14}

= y^{(4-7)/14}

= y^(-3/14) Ans.

read more similar questions: Which equation can be simplified to find the inverse of y = x2 – 7? a: x=y ^ 2 - 1/7 b: 1/x = y^2 - 7 c: x = y^2 – 7 d: –x = y^2 – 7..

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2 years ago

Which statement correctly compares the average number of eggs laid per day for each barn?

kicyunya [14]

By taking the average number of eggs for both barns, we will see that the correct option is A.

<h3>How to get the average?</h3>

For a set of N elements {x₁, x₂, ..., xₙ} the mean is given by:

$M = \frac{x_1 + x_2 + ... + x_n}{N}$

For barn 1, the set is {2, 5, 5, 6}

So the mean is:

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So the mean is:

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5 0

3 years ago