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konstantin123 [22]
3 years ago
15

Find Sn for the given arithmetic series a1=-26 d=-9 n=24

Mathematics
1 answer:
ryzh [129]3 years ago
5 0

Answer:

- 3108

Step-by-step explanation:

The sum to n terms of an arithmetic series is

S_{n} = \frac{n}{2} [ 2a_{1} + (n - 1)d ]

Substitute the given values into the formula

S_{24} = \frac{24}{2} [ (2 × - 26) + (23 × - 9) ]

                          = 12 ( - 52 - 207 )

                         = 12 × - 259 = - 3108

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Answer:

The Triangle Sum Theorem is also called the Triangle Angle Sum Theorem or Angle Sum Theorem. It says that all the angles <em>inside</em> a triangle add up to 180°.

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Take a look at the picture attached. It has a "formula": ∠a+∠b+∠c=180°

Use this as it will help you a lot. You plug in the info you already know (it doesn't matter which angle is a,b,c) and solve for the missing one. :)

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6 0
3 years ago
Can someone HELP ME PLEASE!
Nadya [2.5K]

Answer:

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5 0
3 years ago
1kg costs £1.28. what is the cost of 250g
vivado [14]
First, convert 1 kg to g.

1 kg = 1000 g

So 1000 g = 1.28

Set up a proportion:

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So 250g costs £0.32
8 0
3 years ago
Which expression is equivalent to b^m•b^n<br> A. b^m-n<br> B. b^m•n<br> C. b^m÷n<br> D. b^m+n
Step2247 [10]
   
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6 0
3 years ago
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The anawer to your question is 3/6, and simplified as 1/2.
4 0
3 years ago
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