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velikii [3]
3 years ago
8

Please help me solve this

Mathematics
1 answer:
ch4aika [34]3 years ago
6 0

Answer:

B

Step-by-step explanation:

A rational number can be expressed in the form

\frac{a}{b} ← where a and b are integers

From the set

3 is rational as it can be expressed as \frac{3}{1}

and \sqrt{9} = 3 ← rational

\sqrt{2}, \sqrt{3} and \sqrt{7} ← are irrational numbers

Thus there are 2 rational numbers out of the 5 given, thus

P( rational ) = \frac{2}{5} → B

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Step-by-step explanation:

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3 years ago
If a string is 28cm, what is the length of the side of a square?
12345 [234]

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hope will help you

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2 years ago
Find the sum of the infinite geometric sequence:<br>8, 4, 2, 1, .......​
tatyana61 [14]

Answer:

<h3>Therefore the sum if the series is 15.98!</h3>

The common ratio is 1/2 or 0.5 . If you multiply the current term by the the common ratio the the output will be the next term.

8⋅1/2=4

4⋅1/2=2

2⋅1/2=1 etc ...

because the absolute value of r is less than 1 we can use the following formula.

a/1−r where a is the first term and r is the common ratio

In our problem

a=8 and r=0.5

Substitute

8/1−0.5=8/0.5=16

The sum of this infinite geometric series is 16.

Also, another formula you can use that is guaranteed to work every time, no matter what, is:

Sn=a(r^n−1/r−1)

All the variables work the same way as above, and "n" is the number of terms in the series. So, say you wanted to find the sum of the first 10 terms and were to substitute everything in:

S10=8(0.5^10−1/0.5−1)

S10=15.984375

Therefore the sum if the series is 15.98!

Step-by-step explanation:

<h2>Hope it is helpful....</h2>
7 0
3 years ago
Eli is a loan officer. he determines his clients’ eligibility for loans and for good interest rates by using their credit scores
ElenaW [278]

Eli is a loan officer. he determines his clients’ eligibility for loans and for good interest rates by using their credit scores, the evaluation of his applicants based on their mean and median credit scores will give Dirk the highest mean score, but Valerie has the highest median score.

<h3>How do you calculate the mean score?</h3>

Generally, The mean is computed by summing all of the scores and then dividing by the number of scores contributed.

In conclusion, with the given data  Roy 750 792 661 Dirk 771 707 755 Haley 643 642 770 Valerie 646 773 762, Dirk has the highest mean score, but Valerie has the highest median score.

Read more about  mean

brainly.com/question/20118982

#SPJ4

3 0
2 years ago
Help.. solve for the given variable <br>-5(r - 6) + 3(-8 + 8r) = -32
12345 [234]
-5(r - 6) + 3(-8 + 8r) = -32

STEP 1: Simplify both sides of the equation.
<span><span><span><span><span><span>(<span>−5</span>)</span><span>(r)</span></span>+<span><span>(<span>−5</span>)</span><span>(<span>−6</span>)</span></span></span>+<span><span>(3)</span><span>(<span>−8</span>)</span></span></span>+<span><span>(3)</span><span>(<span>8r</span>)</span></span></span>=<span>−32 </span></span>(Distribute)
<span><span><span><span><span><span>−<span>5r</span></span>+30</span>+</span>−24</span>+<span>24r</span></span>=<span>−32</span></span><span><span><span>(<span><span>−<span>5r</span></span>+<span>24r</span></span>)</span>+<span>(<span>30+<span>−24</span></span>)</span></span>=<span>−32 </span></span>(Combine Like Terms)
<span><span><span>19r</span>+6</span>=<span>−32</span></span><span><span><span>19r</span>+6</span>=<span>−32
</span></span>
STEP 2: Subtract 6 from both sides.
<span><span><span><span>19r</span>+6</span>−6</span>=<span><span>−32</span>−6</span></span><span><span>19r</span>=<span>−<span>38

STEP 3: Divide both sides by 19.
19r/19 = -38/19
r = -2

FINAL ANSWER: r  = -2</span></span></span>
5 0
4 years ago
Read 2 more answers
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