What are the first four terms in the nth term n(2n + 1)

Mathematics

1 answer:

Bingel [31]3 years ago

6 0

Answer:

Explination:

0 x anything is still zero, but I don't know if that counts.

1 (2+1) = 3

2 (4+1) = 10

3 (6+1) = 21

4 (8+1) = 36

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Sylvia and her sister are both reading books. Sylvia reads 2 pages every 5 minutes. Her sister reads 3 pages every 6 minutes. Wh

umka21 [38]

Answer:

Step-by-step explanation:

Silvia: 2 pages to 5 minutes

into...

Silvia: 1 page to __ minutes

<u>Find Unit Rate</u> : 5/2= 2.5

Unit Rate for Silvia is 2.5

<u>Written out</u> : 2 pages x 2.5 = 5 minutes

<u>Example</u> : 1 page to 2.5 minutes

<u>What we found</u> : ___ pages to 60 minutes(60 divided by 2.5) is

<h2>24 pages to 60 minutes</h2>

Silvia's sister: 3 pages to 6 minutes

into...

Silvia's sister: 1 pages to ___ minutes

<u>Find Unit Rate</u> : 6/3= 2

Unit Rate for Silvia is 2

<u>Written out</u> : 3 pages x 2 = 6 minutes

<u>Example</u> : 1 page to 2 minute

<u>What we found</u> : ___ pages to 60 minutes(60 divide by 2) is

<h2>30 pages to 60 minutes </h2>

<u>Final Step</u> : 30 - 24 = 6

7 0

3 years ago

How many sets of 7 questions can be chosen from a file of 25 questions?

likoan [24]

If all 25 questions are different,

When order of selection counts:
P(25,7)
=25!/(25-7)!
=15511210043330985984000000/6402373705728000
=2422728000

When order of selection does not count count:
C(25,7)
=25!/(7!*(25-7)!)
=15511210043330985984000000/(6402373705728000*5040)
=480700

3 0

3 years ago

Select the margin of error that corresponds to the sample mean that corresponds to each population:

shusha [124]

Answer:

(351.04, 368.96)

4 0

3 years ago

Read 2 more answers

18.194 rounded to the nearest hundredths

ehidna [41]

18.19
-you're welcome