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Komok [63]
3 years ago
7

If a1=1. And r=1/5 find a8

Mathematics
1 answer:
Kruka [31]3 years ago
7 0

Answer:

a₈ = \frac{1}{78125}

Step-by-step explanation:

The nth term of a geometric sequence is

a_{n} = a₁(r)^{n-1}

Here a₁ = 1 and r = \frac{1}{5} , then

a₈ = 1 × (\frac{1}{5}) ^{7} = 1 × \frac{1}{78125} = \frac{1}{78125}

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Gina bought x cans of peas for $0.85 each and yvcans of corn for $0.78 each. She bought 2 more cans of peas than cans of corn. T
kkurt [141]
We will need to use a systems of linear equations here. Firstly, we will use x for cans of peas and y for cans of corn. This is kind of difficult to explain, but basically, our first equation is going to be the amount x and y costs. Therefore, 0.85x + 0.78y = 6.59. This works because we need to find out how much cans she bought of each.

Next, we know that she for 2 more cans of peas than cans of corn. We can use the equation, 2 + y = x, to represent this situation. This is because she purchased two more cans of peas, so we add 2 to y (cans of corn).

Our equations are: 0.85x + 0.78y = 6.59, 2 + y = x
3 0
2 years ago
Winona got her hair cut for $21. She left a 15% tip for the hair stylist. What is the total amount of money Winona paid?
Amanda [17]

Answer:

$24.15

Step-by-step explanation:

What you do is you take 15% and make it into a decimal which is .15.

Then you times it by $21. 21*.15=3.15.

You then take the $3.15 and add it to $21 to get

$24.15 as your answer.

5 0
3 years ago
What is the value of -8(17-12)/-2(8-(-2))<br> A. -4<br> B. -2<br> C. 2 <br> D.4
Murljashka [212]

Answer:

C. 2

Step-by-step explanation:

-8*17=-136

-8*-12=96

-136+96=-40

-2*8=-16

-2*2=-4

-16-4=-20

-40/-20=2

7 0
3 years ago
Hey, you damm extras solve this problem for a random girl or ur gonna have to battle the future No.1 hero.
bekas [8.4K]

Answer:

2 9/32

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
2. Candles normally cost £6 each.
saw5 [17]

Answer:  candies are us has a better offer

Step-by-step explanation:

for the candies r us website, the price of the candies is 30*6 then times 0.8=$144

and for waxz, if you buy 3 get 1 free, then you at least have to buy 3 candies 9 times, and that would be 18*9 which equals 162, which is more expensive then waxz

hope this helps!

please make me brainliest! thanks!

8 0
3 years ago
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