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4 years ago

There are 14 books on a shelf. 9 of these books are new.

Mathematics

2 answers:

Katarina [22]4 years ago

5 0

Answer:

all books to new books- 14:5

used books to new books- 5:9

Step-by-step explanation:

marshall27 [118]4 years ago

4 0

Answer: a. 14:5 b. 5:9

Step-by-step explanation:

There are 14 books and 9 are new so subtract 9 from 14 and get 5 and your ration would be 14:5. Once you have the answer to a you know how many new books there are and how many old books there are, so you can easily figure out the ratio would be 5:9.

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3 years ago

When 50% of a number is added to the number, the result is 195.<br> What is the number?

olasank [31]

Answer:

The required number is 130

Step-by-step explanation:

Let the number be x

Given :-. 50% of a number ( 50% of x ) is added to the number ( x ) the result is 195.

$50\% \: of \: x \: + x = 195 \\ \\ \frac{50}{100} \times x + x = 195 \\ \\ \frac{1}{2} x + x = 195 \\ \\ \frac{3}{2} x = 195 \\ \\ x = 195 \times \frac{2}{3}$

x = 130 !

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4 years ago

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6 0

3 years ago

Read 2 more answers

The perimeter of a rectangular pool is 312 m.

expeople1 [14]

The perimeter of a rectangle is calculated by:

$\boxed{P=width +width+length+ length}$

Remember: In a rectangle, opposite sides are equals.

If we know how much is the width, then it's just apply it to the expression:

$P=width+width+length+length\\312 =68 + 68 + length + length\\312 = 136+(2\cdot length)\\312 - 136 = 2\cdot length\\2\cdot length = 176\\length = \frac{176}{2} \\length = 88$

Therefore, the length of the pool is 88m.

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3 years ago

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Oxana [17]

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