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andrezito [222]
3 years ago
7

The ratio of cassette to compact disc is 10 to 3 and the number of cassettes is 10 less than 5 times the number of compact discs

. How many cassettes are there
Mathematics
1 answer:
OlgaM077 [116]3 years ago
5 0

There are 20 cassettes.

Step-by-step explanation:

Given,

Ratio of cassette to compact disc = 10:3

Let,

the number of cassettes = 10x

Number of compact disc = 3x

According to given statement;

the number of cassettes is 10 less than 5 times the number of compact discs.

10x = 5(Number of CD) - 10

10x=3(5x)-10 \\10x=15x-10\\10=15x-10x\\10=5x\\5x=10

Dividing both sides by 5

\frac{5x}{5}=\frac{10}{5}\\x=2

Number of cassettes= 10x = 10(2) = 20

There are 20 cassettes.

Keywords: variable, ratio

Learn more about variables at:

  • brainly.com/question/10414011
  • brainly.com/question/10483199

#LearnwithBrainly

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What is the answer to 4/5+9/11
SCORPION-xisa [38]
Hi there! 
When adding fractions we ALWAYS need to make sure the that denominators are the SAME .We need to find a common denominator so that the two fractions are on the same terms. In the end, the denominator stays the same. Let's start: 
We are given 2 fractions to add: 
\frac{4}{5} + \frac{9}{11}

We need to find a LEAST common denominator, start by listing the factors of 5 and 11 since both of these numbers are in the denominator. 

Factors of 5: <span>5, 10, 15, 20, 25, 30, 35, 40, 45, 50, </span><span>55
Factors of 11: </span><span>11, 22, 33, 44, </span><span><span>55

</span>As we see above, 55 is our LCD (least common denominator) 

We can change the denominator of both fractions to 55 since this is our LCD:
</span>\frac{4}{55} + \frac{9}{55}

However, if the denominator changes, the numerator changes as well. We use the following formula to find the numerators: 

(Common Denominator ÷ Denominator) x Numerator =  Numerator

Lets start by finding the numerator for the first fraction: 
4/55

<span>(55 (common denominator) ÷ 5 (original denominator) × 4 (numerator) = 44</span>

The first fraction becomes: 

\frac{44}{55}

Now let's do the second:

9/55

<span>(55(common denominator) ÷ 11(original denominator))×9(</span>numerator) = 45

Now we have: 

\frac{45}{55}

Now we have two fractions to add: 

\frac{44}{55} + \frac{45}{55}

Only add the numerators, the denominators stay the SAME !

44+45=89

Final answer: \frac{89}{55}

If you have further questions on this problem, please do not hesitate to comment below! :) Have a nice day! 

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So your answer would be in fratcion form:
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Word Form:
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