Several mountain climbers move up a mountain

Mathematics

1 answer:

Dimas [21]3 years ago

6 0

Answer:

2 5/8

Step-by-step explanation:

You might be interested in

The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).

lesantik [10]

Answer:

(a).

$S_{n} = \frac{n}{2} (4n + 20) \\ \\S _{n - 1} = \frac{(n - 1)}{2} (4n - 4 + 20) \\ \\ S _{n - 1} = \frac{(n - 1)}{2} (4n + 16) \\ \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2} \\ \\ { \boxed{S _{n - 1} = {2 {n}^{2} + 6n - 8}}} \\$

(b).

from general equation:

$S _{n - 1} = \frac{(n - 1)}{2} (4n + 16)$

first term is 4n

common difference:

$16 = \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d = \frac{16}{n - 2}$

8 0

3 years ago

Write an inequality. One fourth of a number increased by 17 is at least 63

Luden [163]

Answer:

1/4x + 17 ≥ 63.

Step-by-step explanation:

'At least 63' is the same as ' greater than or equal to 63'.

So that would be 1/4x + 17 ≥ 63.

8 0

3 years ago

What is the pattern 3,3.3,3.63,3.993

Maru [420]

Each number is the number before it multiplied by 1.1
And since it is multiplied, there is a common ratio and so it is a geometric sequence.
3 x 1.1 = 3.3
3.3 x 1.1 = 3.63
And it goes on.

Hope this helps :)

6 0

3 years ago

Read 2 more answers

What is the inequility?

antiseptic1488 [7]

The inequality is e-7>1 The simplifies version of that inequality is e>8

7 0

3 years ago

-20÷5(-3)+4(-2)(-1)-4²<br>step by step please and thank you!

disa [49]

$\huge \boxed{\mathbb{QUESTION} \downarrow}$