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emmainna [20.7K]
3 years ago
7

Which of the following is an arithmetic sequence?

Mathematics
1 answer:
Serhud [2]3 years ago
8 0

Answer:

D

Step-by-step explanation:

An arithmetic sequence is a series of numbers that increases or decreases by a certain quantity every step. A is not an arithmetic sequence, since it alternates between 2 and -2. B is not an arithmetic sequence, since it does not grow constantly in one direction. C is not an arithmetic sequence, but rather a geometric one. D is an arithmetic sequence, decreasing by 3 with each step. Hope this helps!

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B-4/6=b/2 solve for b
DIA [1.3K]
First you cross multiply.

2*(b-4)=6b

Then distribute the 2.

2b-8=6b

Minus 2b from each side.

-8=4b

Divide each side by 4.

-2=b

So -2 is your answer.
8 0
2 years ago
WILL MARK BRAINLIEST! Shelly served the volleyball over the net 17 out of 25 times. What is her percentage of serving the ball o
Tju [1.3M]

Answer

68℅

Explanation

17/25 =

17 ÷ 25 =

0.68 =

0.68 × 100/100 =

0.68 × 100% =

(0.68 × 100)% =

68%;

Hope that this helps you and have a great day :)

8 0
2 years ago
Read 2 more answers
What does 7 + 2x = 9
miss Akunina [59]

Answer:

1

Step-by-step explanation:

7 + 2x = 9

Carry over the 7 to the 9.

2x = 9-7

2x= 2

x = 2÷2

x = 1

6 0
3 years ago
Read 2 more answers
If -<br> 3- 12, what is the value of x?<br> 4<br> 00<br> O 18<br> 0 24
malfutka [58]

Answer:

8

Step-by-step explanation:

\frac{2}{3} = \frac{x}{12}

We make the denominator the same by multiplying \frac{2}{3} by 4.

\frac{8}{12} = \frac{x}{12}

Thus, x = 8.

6 0
2 years ago
A hospital prepares a 100mg supply of technetium-99m which has a half-life of 6 hours. what is the decay factor?
SashulF [63]
For a half- life, the formula is
A(t) = A0(0.5)^( t / t_0.5)
where A(t) is the amount of substance at time t
A0 is the initial amount of subtance
t_0.5 is the time it will reduce its amount to half
t is the time

substitute the given to the formula
A(t) = 100(0.5)^( t/6 )
so the decay factor is 0.5^( t/6 )
6 0
3 years ago
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