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Umnica [9.8K]
3 years ago
8

Identify which of the sequences below is a geometric sequence.

Mathematics
2 answers:
Alexxx [7]3 years ago
8 0

Answer:

The right answer is d. 3, 6, 12, 24, 48

Step-by-step explanation:

To find the right answer, we need to know that for a sequence to be a geometric sequence; each term has to be multiple of the previous term, and it has to be the same multiple for all terms.

we're going to check all the answer to seek the right answer.

Checking a. 1, 3, 5, 7, 9.

Three is three times 1, but 5 isn't multiple of 3, with this we can see a isn't the right answer.

Checking b. 2, 4, 6, 8, 10,

Four is twice 2, but 6 isn't multiple of 4, with this, we can see b isn't the right answer

Checking c. 2, 5, 7, 10, 12,

Five isn't multiple of 2 so, c isn't the right answer.

Checking d. 3, 6, 12, 24, 48,

Six is  twice three; twelve is twice six, twenty-four is twice twelve, and

forty-eight is twice twenty-four.

we can see that in d all the terms are multiples and twice the previous term, so this is the right answer.

PLZ MARK ME BRAINLEST THX

givi [52]3 years ago
7 0
<h3>Answer: Choice D)  3, 6, 12, 24, 48</h3>

===============================================

Explanation:

Sequence A is not geometric. Dividing each term by its previous term does not lead to the same common ratio. For instance, 3/1 = 3 and 5/3 = 1.67

Sequence B is a similar story. We have 4/2 = 2 and -6/4 = -1.5

Sequence C is similar as well. This time 5/2 = 2.5 and 7/5 = 1.4

--------

Sequence D is geometric because dividing each term over its previous term leads to the same common ratio

6/3 = 2

12/6 = 2

24/12 = 2

48/12 = 2

The common ratio is r = 2.

Put another way, each term is multiplied by 2 to get the next term

3*2 = 6

6*2 = 12

12*2 = 24

24*2 = 48

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Please guys this is easy, I need help ASAP! (Giving brainliest)!
jasenka [17]

Answer:

4a. 13

4b. -4

Step-by-step explanation:

2x-6/5 = 4 (Muti each side by 5)

2x-6 = 20

2x = 26 (Divide each side by 2)

x = 13

7- 2x/4 = 9

-2x/4 = 2 (Muti each side by 4)

-2x = 8 (Divide each side by -2)

x = -4

5 0
2 years ago
In ΔABC, If AB=BC and ∠B=40∘,what is the measure of ∠C?
AlekseyPX

Answer:

70

Step-by-step explanation:

all angles in a triangle add up to 180

if two sides are equal their angles are equal

180-40

140÷2

70

7 0
2 years ago
How much pure acid is in 780 milliliters of a 12​% ​solution?
GarryVolchara [31]

Answer:

93.6 ml

Step-by-step explanation:

12% of that 780 ml is pure acid:  0.12(780 ml) = 93.6 ml

7 0
3 years ago
Two polynomials are given below.
Kazeer [188]
P+q= 5x^2+2
q-p= -(x-2) (x+2)
3 0
3 years ago
A population of a particular yeast cell develops with a constant relative growth rate of 0.4225 per hour. The initial population
Ksju [112]

Answer: The population after 3 hours is 13.9 mill.

Step-by-step explanation:

When we have an exponential with:

A  = initial population.

r = constant relative growth rate:

t = time.

The function that models this is:

P(t) = A*e^(k*t)

In this case we know that:

A = 3.9 mill.

r = 0.4225 1.

Then the function that models the population of this yeast cell is:

P(t) = (3.9 mill)*e^(0.4225*t)

where t represents the time in hours.

Then if we want to know the population after 3 hours, we should replace t by 3.

P(3) = (3.9 mill)*e^(0.4225*3) = 13.85 mill.

And we want to round our answer to one decimal place, then we must look at the second decimal place, we can see that is a 5, so we should round up.

The population after 3 hours is 13.9 mill.

8 0
3 years ago
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