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horsena [70]
3 years ago
8

What is the sum of the arithmetic series

Mathematics
1 answer:
schepotkina [342]3 years ago
4 0

Answer:

Step-by-step explanation:

If the series has a fixed gap between entities (terms).

Add the first and the last values and multiplied by the half of number of terms

For example

\frac{n}{2} (N_{1}+ N_{n})

2,4,6,8,10 = 5/2 (2 + 10) =30

2+4+6+8+10 =30

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Evaluate the following expression when r= 3 and t = 3.<br> (2 + r) - 11
vitfil [10]

Answer:

-6

Step-by-step explanation:

substitute

(2 + 3) -11

5 - 11

-6

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3 years ago
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If socks cost $8.97 for 3 pairs how much does one pair cost?
Dovator [93]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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Using the number line as a guide, work out the difference between the numbers given.
inn [45]

Answer:

If these are addition:

1) 7

2) 3

3) 1

4) -3

5) 0

6) -5

If they are subtraction:

1) 9

2) 9

3) -7

4) 7

5) -4

6) 3

Step-by-step explanation:

Difference is subtraction, but your examples (7 and -3 = 10) implies that these are addition problems. Next time please set them up in a mathematical form.

This is how the problems would be set up:

Addition:

1) 8+(-1)= 7

2)6+(-3)= 3

3)-3+4= 1

4)2+(-5)= -3

4)-2+(-2)= 0

6)-1+(-4)= -5

Subtraction:

1) 8-(-1)= 9

2)6-(-3)= 9

3)-3-4=- 7

4)2-(-5)= 7

4)-2-(-2)= -4

6)-1-(-4)= 3

8 0
3 years ago
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