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2 years ago

What is the twentieth term of the arithmetic sequence 21, 18, 15, 12, ... ?

Mathematics

1 answer:

Vaselesa [24]2 years ago

8 0

Answer:

-36

Step-by-step explanation:

21, 18, 15, 12....

All you have to do is subtract 3 less on each number you get, until u get to the twentieth term....

21, 18, 15, 12, 9, 6, 3, 0, -3, -6, -9, -12, -15, -18, -21, -24, -27, -30, -33, <u><em>-36</em></u>

-36 is the twentieth term of this arithmetic sequence

Hope this helped!

Have a supercalifragilisticexpialidocious day!

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Find the value of b. B² = 256

Jlenok [28]

$B^2=256$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$B=\sqrt{256},\:B=-\sqrt{256}$

$\sqrt{256}$

$\mathrm{Factor\:the\:number:\:}\:256=16^2$

$=\sqrt{16^2}$

$=16$

$-\sqrt{256} =-16$

$B=16,\:B=-16$

<h3><em>Hope I helped you!</em></h3><h3><em>Success!</em></h3>

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3 years ago

Coral beef grew 19.5 mm taller. how much did it grow in meters?

Serggg [28]

1 meter = 1,000 millimeter

We can solve this by making two proportion or millimeter over meter: $\frac{millimeter}{meter}$

$\frac{19.5 mm}{x meter} = \frac{1,000 mm}{1 m}$

Now you must solve for the unknown meter under the first proportion:

(1,000)(x meter) = 19.5 * 1

1,000(x meter) = 19.5

x meter = 0.0195 m

19.5 mm = 0.0195 m

Hope this helped! Let me know if you have any further questions

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3 years ago

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icang [17]

Answer:

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Step-by-step explanation:

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2 years ago

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3 years ago

What is the probability of living another year for a woman who is 73 years old ?

AlladinOne [14]

Answer:

0.980413

Step-by-step explanation:

The table for the deaths and death rate per 100,000 population is attached below ;

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Hence, the probability of living another year is :

Number of deaths per 100,000 population ;

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Probability of living another year = 1 - P(death)

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3 years ago