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Katena32 [7]
2 years ago
6

Mark has 30 cd's. 40% are country music. 30% pop music. How many CDs are other types of music?

Mathematics
2 answers:
Luda [366]2 years ago
5 0
So first you add 40 percent and 30 percent to get 70 percent. After you do that subtract it from 100 to get 30. 30% times 30 is 9 so the answer is 9 cds.
hoa [83]2 years ago
5 0
9 cd's because you multiply .7*30 and that is 21 so 30-21=9
 
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Ksju [112]

Answer:

1020 students

Step-by-step explanation:

Given the trend line equation :

y = 0.1x + 18,

where y is the total number of staff members and x is the total number of students.

Using the equation, the predicted number of students in a school with 120 staffs ;

y = 120

y = 0.1x + 18

120 = 0.1x + 18

120 - 18 = 0.1x

102 = 0.1x

x = 102 / 0.1

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2 years ago
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3 years ago
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4 0
3 years ago
What is 3 divided by 2/3 x 3? <br><br> please show work!
IgorC [24]

<u>Answer:</u>

<em>The correct answer is 1 1/2</em>

<u>Step-by-step explanation:</u>

<em>First, We need to find out the sum of 2/3  x 3, change 3 into a fraction if you want</em>

<em>3x2=6 and 1x3 is 3, So 2/3 x 3 is 6/3 or 2</em>

<em>Next, divide 3 by 2, change to fractions if needed</em>

<em>Remember keep, change and flip, flip 2/3 to 1/2</em>

<em>Then, you multiply 3/1 and 1/2 3x1=3 1x2=2</em>

<em>Finally divide 3 by 2. 3  ÷ 2 is 1 1/2</em>

<em>I hope this helped!</em>

<em />

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3 years ago
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