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Arlecino [84]
2 years ago
13

Please help!!! If the first 4 terms of a geometric sequence are...

Mathematics
1 answer:
tigry1 [53]2 years ago
7 0

Answer:

c.) aₙ = 5 × 4ⁿ⁻¹

Explanation:

Geometric sequence: aₙ = a(r)ⁿ⁻¹

where 'a' resembles first term of a sequence, 'r' is the common difference.

Here sequence: 5, 20, 80, 320,...

First term (a) = 5

Common difference (d) = second term ÷ first term = 20 ÷ 5 = 4

Hence putting into equation: aₙ = 5(4)ⁿ⁻¹

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If C= (-10, -9, -8, -7 ,-6 , -5) and D= ( -6, -5, -4, -3, -2, -1, ) , what is C n D ?
andrey2020 [161]

Answer:

C ∩ D = -5, -6

Step-by-step explanation:

Commons ones in both C and D are -5 and -6

7 0
2 years ago
In the triangle shown above m∠B = 114°, m∠C = 22°, and b = 12 in. What is the approximate length of side a? A. 15.78 in B. 9.12
Elena L [17]

The approximate length of side a is 9.12 in. The correct option is B. 9.12 in

<h3>Law of Sines </h3>

From the question, we are to determine the approximate length of side a

From the given information, we have that

m∠B = 114°, m∠C = 22°

Thus,

m∠A = 180° - (114° + 22°)

m∠A = 180° - 136°

m∠A = 44°

Now,

From the law of sines, we have that

a/sinA = b/sinB

Then,

a/sin44° = 12/sin114°

a = (12 ×sin44°)/sin114°

a = 9.12 in

Hence, the approximate length of side a is 9.12 in. The correct option is B. 9.12 in

Learn more on Law of Sines here: brainly.com/question/24138896

#SPJ1

4 0
1 year ago
11. The news reports that today's high temperature is 16°F colder than
LenaWriter [7]

Answer:

2x3+6x2/5x3 thats the expression

Step-by-step explanation:

3 0
2 years ago
Please help me <br><br> X*1+ x/1<br><br> Pick one of these<br> x<br> 1<br> 2x<br> 1+x
Zinaida [17]

Answer:

2x

Step-by-step explanation:

x*1 is x

x/1 is also x

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3 years ago
What single percentage change is equivalent to a 8% decrease followed by a 15% decrease?
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Answer:

0.92!

Step-by-step explanation:

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2 years ago
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