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SpyIntel [72]
3 years ago
12

This geometric sequence? What is the explicit formula for 8, 4, 2, 1, ...

Mathematics
1 answer:
scoundrel [369]3 years ago
5 0

Answer:

D

Step-by-step explanation:

the first term is 8, the ratio is 1/2 ( 8*1/2 = 4, 4*1/2 = 2, 2*1/2 = 1)

the formula for an explicit geometric formula is :

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

plug in your numbers :

a_{n} = 8 * (\frac{1}{2}) ^{(n-1)}

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Bonus: Find the measure indicated. *
velikii [3]

Answer:

AC = 16 in.

Step-by-step explanation:

AD = CD = 10 in.

BD = 6 in.

AC = 2(AB) = ?

Apply pythagorean theorem to find AB

AB² = AD² - BD²

Substitute

AB² = 10² - 6²

AB² = 64

AB = √64

AB = 8

Therefore:

AC = 2(AB) = 2(8)

AC = 16 in.

5 0
3 years ago
What is the interquartile range numbers 777,498,619,379,895,1256,1052​
Kay [80]

Answer:

554

Step-by-step explanation:

554  trust meh dude

8 0
3 years ago
Read 2 more answers
A motor is 85.4 % efficient: that is, the output is 85.4 % of the input. What is the input if the motor delivers 10.75 hp. ( Rou
Ludmilka [50]

Answer:

12.6 hp

Step-by-step explanation:

Represent the input by n.                              10.75 hp

Then 0.85n = 10.75 hp, and n (the input) is --------------- = 12.6 hp

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5 0
4 years ago
Write an expression equivalent to e+e+e+e+e that is a sum of two terms.
slamgirl [31]

Answer:

5e

5(e)

Step-by-step explanation:

please mark this answer as brainliest

5 0
3 years ago
What is the product of 8x-3 and x2- 4x +8
Dmitriy789 [7]
A product is the answer that you get when you multiply numbers together. So for this problem, you have 2 groups to multiply together. Since I cannot show a square or cubed x, I will put an x2 for x squared and an x3 for x cubed. You have to multiply each number in the first parentheses by each number in the second parentheses. Then combine any like sets.

(8x-3)(x2-4x+8)
8x3-32x2+64x-6x+12x-24
8x3-32x2+70x-24

So the answer is 8x cubed minus 32x squared plus 70x minus 24. Whew! That's a long one. Hope I didn't miss anything.
5 0
3 years ago
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