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2 years ago

Which of the following are geometric series?

Mathematics

2 answers:

Temka [501]2 years ago

6 0

Answer:

-256 +64 - 16 + 4 - 1

Step-by-step explanation:

A series is the summation of all the terms in a sequence.

So it is only the last three options that qualify to be a series.

The series 2 +5 + 8 + 11 + 14 + 17 has no common ratio. It is not geometric.

The series 1+1+2+3+5+ 8 +13 +21 also has no common ratio. It is not geometric.

The series -256 +64 - 16 + 4 - 1 has a common ratio of

$r=\frac{64}{-256}=-\frac{1}{4}$

There the only series that is geometric is.

-256 +64 - 16 + 4 - 1

aleksklad [387]2 years ago

6 0

Answer:

A. and D.

Step-by-step explanation:

trust meeee

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8 hours (hrs) = minutes (min)

LenKa [72]

Answer: 480 minutes

Step-by-step explanation: There's 60 minutes in 1 hour. Multiply the number of minutes in an hour times the number of hours. 8*60=480

6 0

2 years ago

Read 2 more answers

The weights of a certain dog breed are approximately normally distributed with a mean of μ = 55 pounds, and a standard deviation

weqwewe [10]

Answer:

(a)z=-1

(b)48.5 pounds

Step-by-step explanation:

$z-score=\dfrac{x-\mu}{\sigma}$

Given:

Mean, μ = 55 pounds

Standard deviation,σ = 6 pounds.

(a)For a dog that weighs 49 pounds.

x=49 pounds

The z-score

$=\dfrac{49-55}{6}\\=\dfrac{-6}{6}\\\\=-1$

(b)When a dog has a z-score of -1.09

$-1.09=\dfrac{x-55}{6}\\x-55=-6.54\\x=55-6.54\\x=48.46 \approx 48.5$ pounds (to the nearest tenth)$

The weight of a dog with a z-score of -1.09 is 48.5 pounds.

(c)When a dog has a z-score of 1.09

$1.09=\dfrac{x-55}{6}\\x-55=6.54\\x=55+6.54\\x=61.54 \approx 61.5$ pounds (to the nearest tenth)$

The weight of a dog with a z-score of 1.09 is 61.5 pounds.

3 0

2 years ago

Use the rules to evaluate or simplify. Write without negative exponents.

zhannawk [14.2K]

(y^-5) / (y^-2)
Flip fraction and get rid of the negative from the exponents (you can do that!)
(y^2) / (y^5)
(y * y) / (y * y * y * y * y)
Cancel y's
1 / (y * y * y)
1 / (y^3)

That's your answer.
Have an awesome day! :)

7 0

3 years ago

PLEASE HELP! I REALLY REALLY NEED HELP!

coldgirl [10]

A is (-1/2, -1/4) because it's on the points (-0.5, -0.25), B is (-2 1/2, 1 1/2) because it's on the points (-2.5, 1.5), and C is (1/4, 1/2) because it's on the points (0.25, 0.5) . Hope this helps!

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3 years ago

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PLEASE HELP ME ASAP PLEASE! I KEEP GETTING SPAMMED

Marysya12 [62]

Given : Area of the parallelogram is 220 square yard

We know that :

⊕ Area of a parallelogram is given by : Base x Height

⇒ Base x Height = 220

Given : Height of the parallelogram = 11 yards

⇒ Base x 11 = 220

⇒ Base = 20 yards

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3 years ago