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Bumek [7]
3 years ago
15

Write the following Arithmetic sequence using an Explicit Formula: a1 = 8, an = an-1 -2

Mathematics
1 answer:
bogdanovich [222]3 years ago
4 0

Answer:

an = 8 - 2*(n - 1)

Step-by-step explanation:

a1 ; .... ; an-1 ; an

r = an - an-1

r = (an-1 - 2) - an-1

r = an-1 - 2 - an-1

r = -2

So:

an = a1 + r*(n - 1)

an = 8 + (-2)*(n - 1)

an = 8 - 2*(n - 1)

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If the quadratic equation <br> 2 + 2 + 5 = 0 is
Flura [38]
The answers should be 10
5 0
3 years ago
Read 2 more answers
Help pleaseee!!!!!!!
Crank

Answer:

1. 180

2. 300

3. 480

Step-by-step explanation:

1. Since 30% of 600 (or 0.3 * 600) = 180, the 1st blank is 180.

2. 50% of 600 (also easy to just think of one half {1/2}) = 300

3. Because 180 + 300 = 480

hope this helps:)

4 0
2 years ago
Please help I need it ASAP
Varvara68 [4.7K]

Answer:

do 1+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=61+1=6

Step-by-step explanation:

5 0
3 years ago
After 5 throws in a game of darts, Brent's mean score was 32. Calculate his total score.
ehidna [41]

1.To know this answer, we need to know some vocabulary that's used in t. Most people don't know how to solve questions if they have hard Vocabulary and what the question is Asking

Mean=The average of all his throws

It's asking us to calculate his total score  

2. Find Clues to help you solve word problems

Finding clues in Word Problems is a very important part a lot of people skip but this helps you solve the question easier

5 throws and Mean Score is 32 are the clues

3. Guess and check

The method to this thingy is called guess and check. There is another method which is slightly harder and i just don't want to do it.

Let's just say his scores were... 5, 6, 4, 5,10Add them up and you get 30Then 30/5

Let's try bigger numbers

20+25+20+20

If you like this method, you may try it another method is called work Backwards

5x32=160

Then divide 160 by 5 to double check and you get 32!!

========================================

Therefore, the answer s 160 as his total score

hope this gives you a clue to what we are doing and when you have a question like this, I really hope you understand the concept

Hope this helped (:

5 0
3 years ago
What is the length of BC in the right triangle below?
Verdich [7]

Answer:

<h2>BC = 39</h2>

Step-by-step explanation:

Use the Pythagorean theorem:

hypotenuse^2=leg^2+leg^2

We have

leg=AC=36,\ leg=AB=15, hypotenuse=BC

Substitute:

BC^2=36^2+15^2\\\\BC^2=1296+225\\\\BC^2=1521\to BC=\sqrt{1521}\\\\BC=39

7 0
4 years ago
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