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Vlada [557]
3 years ago
6

a school library has a hundred and twenty DVDs in its collection given that 45% of the DVDs are about science and 35% are about

history how many of the DVDs are about other subjects
Mathematics
2 answers:
valkas [14]3 years ago
6 0
45 % + 35% is 80%
80% of 120 (.80 times 120) = 96
120-96= 24
24 of the books are other subjects
son4ous [18]3 years ago
3 0
20% of the DVDs are about other subjects

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Express 0.6 as a fraction.
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Answer: 3/5

Step-by-step explanation: Using the place value chart, we can see that the decimal 0.6 is 6 tenths. So we can write 0.6 as the fraction 6/10.

Notice however that 6/10 is not in lowest terms.

So we need to divide the numerator and the denominator by the greatest common factor of 6 and 10 which is 2.

So if we divide the numerator and denominator by 2, we get 3/5.

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Image provided showing the place value chart.

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3 years ago
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Answer:

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Step-by-step explanation:

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5 0
3 years ago
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Marrrta [24]

Answer:

The measure of the angle ABD is:

m∠ABD = 122°

Step-by-step explanation:

Given

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m∠CBD = 38°

To determine

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The given diagram shows that m∠ABD is the sum of m∠ABC and m∠CBD.

In other words,

m∠ABD = m∠ABC + m∠CBD

substituting m∠ABC = 84° and m∠CBD = 38°

m∠ABD = 84° + 38°

m∠ABD = 122°

Therefore, the measure of the angle ABD is:

m∠ABD = 122°

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