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4 years ago

Which of the following is not a proportion?

Mathematics

2 answers:

Alina [70]4 years ago

5 0

4/10 = 12/20 since 4/10 = 10/20

Ivahew [28]4 years ago

4 0

Hiya there! :D The answer to your question is 4/10= 12/20. That is NOT A PROPORTION. Anyways I just did for the first one 1*3=3 and 4*3= 12 which is 3/12. Next 4/10= 12/20. Nope you can't do that. 4/10= 0.40 and 12/20= 0.60 those are not the same.2/4= 3/6 those both equal 1/2. You can simplify them and make them 1/2 and they are the same! They both equal to 1/2 and 0.50. Last but not least 8/6= 20/15. 8/6= 1.333333 and 20/15= 1.3333333. So yeah that's how I got my answers! ;D

Hope I helped! Have a nice day! ;) :D :)

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What are three possible products whose factors multiply to -7?

kifflom [539]

-1 x 7

-7 x 1

-3.5 x 2

3.5 x -2

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3 years ago

Rationalize the denominator: GRADE 9 CBSE

kakasveta [241]

Answer:

1. a)

$\begin{gathered} \frac{2}{ \sqrt{3} - 1 } = \frac{2}{ \sqrt{3} - 1} \times \ \frac{ \sqrt{3} + 1}{ \sqrt{3} + 1 } \\ = \frac{2 \sqrt{3} + 2 } {( \sqrt{3} ) {}^{2} - 1 {}^{2} } = \frac{2 \sqrt{} 3}{3 - 1} = \frac{2 \sqrt{3} }{2} \\ = \sqrt{3} \end{gathered}$

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$\begin{gathered} = > \: \: \frac{7}{ \sqrt{12} - \sqrt{5} } \\ \\ = > \: \: \frac{7}{ \sqrt{12} - \sqrt{5} } \times \frac{ \sqrt{12} + \sqrt{5} }{ \sqrt{12} + \sqrt{5} } \\ \\ = > \: \: \frac{7( \sqrt{12} + \sqrt{5} ) }{ {( \sqrt{12}) }^{2} - {( \sqrt{5}) }^{2} } \\ \\ = > \: \: \frac{7( \sqrt{12} + \sqrt{5}) }{12 - 5} \\ \\ => \: \: \frac{ \cancel{7}( \sqrt{12} + \sqrt{5} ) }{ \cancel{7}} \\ \\ => \: \: \sqrt{12} + \sqrt{5} \end{gathered}$

7 0

2 years ago

In rectangle PLAN, PT = x + 3 and TL = 3x - 11. What are the lengths of PA and NL?

AveGali [126]

Answer:

PA = 20 units

NL = 20 units

Step-by-step explanation:

Property of a rectangle,

"Diagonals of a rectangle are equal in measure and divide each other in two equal parts"

By using this property,

PT = TL

(x + 3) = (3x - 11)

3x - x = 11 + 3

2x = 14

x = 7

Length of PT = (x + 3) = 10

Length pf PA = 2(PT) = 20 units

Length of NL = PA = 20 units

7 0

3 years ago

If a bag contains 12 quarters, 6 dimes, and 18 nickles, what is the part-to-whole ratio of nickles to all coins?

Vlad [161]

Answer:

1:2

Step-by-step explanation:

There are 18 nickles so that number is 18. When added together, there are 36 total coins. Since it states nickle to all coins, we replace to with a colon and replace the words with the related numbers.

18:36

like a fraction, ratios can be simplified. 18 is half of 36 so the ratio would go to 1:2. This means that 1 in every 2 coins is a nickle.

7 0

4 years ago

Read 2 more answers

-8 -5 + 9h - 2f using h = 7 and f =9 ?

kherson [118]

The equation would be -8 - 5 + 9(7) - 2(9) --> -13 + 63 - 18 = 32

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4 years ago