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tester [92]
2 years ago
9

The explicit formula for the geometric sequence 10,30,90,180

Mathematics
2 answers:
alukav5142 [94]2 years ago
7 0

Answer:

a_{n} = 10 (3)^{n-1}

Step-by-step explanation:

The n th term of a geometric sequence is

a_{n} = a (r)^{n-1}

where a is the first term and r the common ratio

Here a = 10 and r = 30 ÷ 10 = 3, thus

a_{n} = 10 (3)^{n-1}

luda_lava [24]2 years ago
7 0

Answer:

nth term =  10(3)^(n-1).

Step-by-step explanation:

General form is a1 r^(n-1)  where a1  is the first term and r is the common ratio and n is the term number.

For this sequence a1 = 10 and r = 30/10 = 3.

The explicit formula is  nth term =  10(3)^(n-1)

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A soccer league has 200 players. Of those players 50% are boys. How many boys are in the soccer league
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QveST [7]
X representa o numero das suas respostas certas.
y represnta o numero das suas respostas erradas.
O total de perguntas <span>é 25, portanto
x + y = 25

Agora tratamos do dinheiro.
Come</span>ça com <span>R$ 500,00
Pelas x respostas certas, recebe 200x.
Pelas y respostas errads perde 150y.
O total de dineheiro inicial mais os ganhos menos as perdas s</span>ão iguais a
R$ 600,00, portanto
500 + 200x - 150y = 600
200x - 150y = 100
20x - 15y = 10

Temos um sistema de duas equações com duas variaveis.

<span>x + y = 25</span>
20x - 15y = 10

      15x + 15y = 375
+    20x - 15y = 10
---------------------------
       35x         = 385
           x         = 11

x + y = 25

11 + y = 25

y = 14

Resposta: Errou 14 perguntas.


5 0
3 years ago
In a major hurry to finish this I was stuck doin other homework last year please help me finish this
Irina-Kira [14]

2 = m ≤ −9

3 = p ≥ 5

4  =  x < -10

5 = b < -10

6 = n < 5

7 = n < 6

8 = r ≤ 4

9 = x ≥ 9

10 = p ≤ 0

11 = x < 1

12 = a > 24

6 0
3 years ago
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