2 years ago

Given 3 + 7 + 11 + 15 + ... find S20

1 answer:

6 0

=4n - 1
Since the sequence is add 4 and 3-4 = -1

20 x 4n = 80-1 = 79

You might be interested in

IgorLugansk [536]

First add 6 &4 and you get ten then you divide 9 by 10 and get .9

5 0

3 years ago

Paladinen [302]

17 + x = 26

17 +n = 26

n + 17 = 26

something like those, you didn't give options to choose from.

8 0

3 years ago

xeze [42]

Some tell me plzzzzzzzzzzxzzzzzzzzz

4 0

3 years ago

gulaghasi [49]

24/5
I think this is the right answer, hope this help

8 0

3 years ago

Igoryamba

Answer:

Step-by-step explanation:

Use PEMDAS:

P Parentheses first

E Exponents (ie Powers and Square Roots, etc.)

MD Multiplication and Division (left-to-right)

AS Addition and Subtraction (left-to-right)

------------------------------------------------------------------------

$4^3+(10-8)\div2=64+2\div2=64+1=65$

3 0

2 years ago