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3 years ago

HELP ASAP ASAP ASAP HELP

Mathematics

1 answer:

Aneli [31]3 years ago

7 0

Answer:

9 9

14 14

19 19

Step-by-step explanation:

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8=3r-1 step by step plss!!

Brilliant_brown [7]

Rewrite it as
3r-1=8
3r=8+1
3r=9
R= 3

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4 years ago

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Simplify 2(x-4)+7(x+4)

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3 years ago

A multiple choice question has 5 answer options of which 2 are correct. What is the probability of randomly choosing the correct

nadya68 [22]

Answer:

2/3

Step-by-step explanation:

I got it right on my test

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3 years ago

If you sell $100,000 worth of art and earn 3%,how much did you make

zaharov [31]

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4 years ago

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Can someone help me and explain step by step

Shkiper50 [21]

Answer: 5) r = 5, 8th term = -78,125

6) r = 5, 8th term = -312,500

7) r = 5, {1, 5, 25, 125, 625}

8) r = 5, {-4, -20, -100, -500, -2500}

<u>Step-by-step explanation:</u>

The explicit formula of a geometric sequence is: $a_n=a_1\cdot r^{n-1}$ , where;

n is the number of the term
a₁ is the first term
r is the common ratio

$5)\ a_n=-5^{n-1}\\.\qquad =-1\cdot 5^{n-1}\quad \rightarrow \quad a_1=-1\ and\ r=5\\\\a_8=-5^{8-1}\\.\quad =-5^7\\.\quad =-78,125\\\\\\6)\ a_n=-4\cdot 5^{n-1}\quad \rightarrow \quad a_1=-4\ and\ r=5\\\\a_8=-4\cdot 5^{8-1}\\.\quad =-4\cdot 78,125\\.\quad =-312,500$

$7)\ a_1=1\ and\ r=5\\.\quad a_2=1\cdot 5=\boxed{5}\\.\quad a_3=5\cdot 5=\boxed{25}\\.\quad a_4=25\cdot 5=\boxed{125}\\.\quad a_5=125\cdot 5=\boxed{625}\\\\\\\\8)\ a_1=-4\ and\ r=5\\.\quad a_2=-4\cdot 5=\boxed{-20}\\.\quad a_3=-20\cdot 5=\boxed{-100}\\.\quad a_4=-100\cdot 5=\boxed{-500}\\.\quad a_5=-500\cdot 5=\boxed{-2500}\\\\\\$

8 0

3 years ago