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there are 18 boys and 12 girl in math class. what is the ratio of girls to total students. A. 18:30 B. 12:30 C. 30:12 D. 30:18 2. which of the following ratios are equivalent to 6:9. Choose all that apply A. 3:2 B. 18/27 C. 30:45 D. 24/32 3. what is the unit price for one CD if 3 CDs cost $29.85? A. 9.65 B. 8.95 C. 9.95 D. 9.85 4. Milo types 34 words per minute. How many words can he type in 7 minutes? A. 245 words B. 240 words C. 250 words D. 275 words

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JERosa12356

Question 1: The answer would be B) 12:30. If the ratio of girls to boys in the class is 12:18, add both of the numbers to get the total number students in the class. So the ratio would be 12:30

Question 2: The answers would be B) 18/27 and C) 30:45. These two ratios if you were to simplify them, would both equal 6:9.

Question 3: The answer would be C) 9.95. To find the unit price for one cd, you would need to divide $29.85 by 3, which equals $9.95.

Question 4: The answer would be B) 240 words. To find the answer, you need to multiply 34 by 7 to find the amount of words, which is 238 words, but the closest answer to this is B.

Hope this helps!

Ratio of girls to total students is 12:30, ratio equivalent to 6:9 are 18:27, and 30:45, 1 CD cost is $9.95 and Milo can do typing 240 words in 7 minutes.

What is ratio?

Ratio indicates quantity of one good in terms of another. If two numbers or goods are x and y then ratio is x:y if both are equal.

How to find ratios?

We have to answer four questions which are answered under:

1) Ratio of girls to total students =number of girls: total number of students in the class

Number of girls=12

Total students=12+18

=30

Ratio of girls to total students=12:30 which is option B.

2) Given ratio is 6:9 and to find the equivalent ratios we need to simplify the options as under:

3:2=3*3:2*3=9:6

18:27=6*3:3*9=6:9

30:45=5*6:5*9=6:9

24:32=4*6/4*8=6:8

Only two options are equivalent to 6:9 which are 18:27 and 30:45.

3) Price of 3 CD's=$29.85

price of 1 CD=29.85/3

=$9.85

Price of one CD is $9.85 which is option D.

4) Typing of words in 1 minute=34

Typing of words in 7 minutes=7*34

=238 words

There is no option of 238 but the nearest number is 240 so B option is correct.

Hence ratio of girls to total students is 12:30, ratio equivalent to 6:9 are 18:27, and 30:45, 1 CD cost is $9.95 and Milo can type 240 words in 7 minutes.

Learn more about ratio at https://brainly.com/question/2328454

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