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user100 [1]
3 years ago
13

I have a sequence of numbers 240 -120 amd 60 whats the 7th number

Mathematics
1 answer:
iren [92.7K]3 years ago
7 0
It is 30 because u r dividing by 2 every time
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stepan [7]

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25 Or A

Step-by-step explanation:

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Help please!!
DanielleElmas [232]

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A couch and coffee table cost a total of $1080. The cost of the couch is two times the cost of the coffee table. Find the cost o
Alborosie

Answer:

$720

$360

Step-by-step explanation:

Let the cost of couch be A and that of coffee table be B

Given couch and coffee table cost $1080

That’s

A + B = $1080

Also, the cost of couch A is 2 times the cost of coffeee table B.

That’s

A = 2B

We now have two equations

A + B = 1080

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Now ,substitute 2B for A in the first equation .

We have

A + B = 1080

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Divide both sides by 3

3B/3 = 1080/3

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Remember A = 2B

Therefore

A = 2 x $360

A = $720

The couch cost $720 while the coffee table cost $360

3 0
3 years ago
Consider a sequence whose first three
snow_tiger [21]

Answer:

Below, depends if 27 is term number 1 or term number 0.  Answered for both cases.  

Step-by-step explanation:

The most common sequences are arithmetic and geometric, so lets check those first.

Arithmetic first since its the easiest.

to go from 27 to 21 we subtract 6, if we subtract 6 from 21 again we get to 15, which is what we need, so it is indeed arithmetic.

Explicit formula is basically of the form of y=mx+b with an arithmetic sequence.  the m is the common difference and b is the first term minus the common difference.  so lets fill those in.  y = -6x + 33

Then it usually has n as the x and y f(n) so we'll just put those in

f(n) = -6n + 33

This si as long as the first term is labeled as term number 1 and not term number 0.  if you have 27 as term 0 instead just make 33 back to 27, so f(n) = -6n + 27

Let me know if this doesn't make sense.

5 0
3 years ago
Cindy wants to buy new jeans. She already has $40 in her savings account. If she puts $2 a week in her savings account, she want
Pachacha [2.7K]

Answer: 21 weeks. i counted it up

Step-by-step explanation: so its

4 0
3 years ago
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