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Neporo4naja [7]
3 years ago
6

The sum of the numbers j,k, and m is 115. The ratio of j to k is 2:7 and the ratio of k to m is 14:5. What is the value of k?

Mathematics
2 answers:
I am Lyosha [343]3 years ago
8 0

Answer:

I know how to help you.

Step-by-step explanation:

There is a web site called Khan Academy and it can help you understand how to solve it and it is completely free and you can use it as much as you want. There are videos that explain it to you and problems like help with practice I 100% reccomend it!

JulijaS [17]3 years ago
7 0

Answer:

f. 70

Step-by-step explanation:

I did this question in another brainly problem, but ok. So first k has to be able to divide by 14 and 7. Divided all the answers by 7 first. Then 14. Only 70 is able to divide by 7 and 14. Lastly check to see if it works. 2:7 = 20=70. 14:5 = 70:25. 20+70+25=115.

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The price of an item yesterday was $135 . Today, the price rose to $216 . Find the percentage increase.
Softa [21]

Answer:

60% increase

Step-by-step explanation:

Work out the difference increase between the two numbers you are comparing.Then you increase the new number by the original number. Next you divide the increase by the original number and multiply the answer by 100. Finally divide the increase number and the original number then multiply by 100. That will give you your answer.

5 0
3 years ago
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What is the quotient of a number and 5​
KengaRu [80]

Sorry but that's an unclear question, can you double check to see if you included everything, and also check to see the possible answers?

3 0
3 years ago
What is a base of 3 with an exponent of-3??<br>​
DaniilM [7]

Answer:

The answer is 1/27

Step-by-step explanation:

3^-3 can be written as 1/3^3 and 3^3 = 3x3x3= 27

Therefore, the answer is 1/27.

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2 years ago
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Calculate the amount of work done if you use a 150N force to push a 50kg box 5m across the kitchen floor.
anzhelika [568]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Select the polynomial that is a perfect square trinomial. 36x2 − 4x 16 16x2 − 8x 36 25x2 9x 4 4x2 20x 25.
Naya [18.7K]

The polynomial a,b,c,are not perfect square polynomial and the polynomial d is perfect square polynomial.

The given polynomial is

a) 36x^2-4x+16

What is the form of perfect square polynomial?

(ax+b)^2

we solve this method by using perfect square method

add and subtract 1/9

36x^2-4x+16+\frac{1}{9}-\frac{1}{9}

factor 36

\frac{143}{9}+36(x^2-\frac{x}{9}+\frac{1}{324} )

Now complete the square

\frac{143}{9}+36(x^2-\frac{1}{18})^2

Therefore this is not perfect square trinomial.

Similarly for

b) 16x^2-8x+36

Complete square is,

16(x-\frac{1}{4})^2+35

This polynomial is also not perfect square trinomial.

c) 25x^2+9x+4\\

complete square is,

25(x+\frac{9}{50})^2+\frac{319}{100}

This polynomial is not perfect square trinomial.

d)4x^2+20x+25\\

complete square is,

(2x+5)^2

This polynomial is perfect square trinomial.

Therefore,

The polynomial a,b,c,are not perfect square polynomial and the polynomial d is perfect square polynomial.

To learn more about perfect square trinomial visit:

brainly.com/question/1538726

3 0
2 years ago
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