This is reposted because the original was posted on another student's thread.

1. 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

1 0
posted by Miranda
today at 2:45pm

First one is B.

Weather -- you're right. Please do not post any more of these answers. I'm sure that Miranda can figure the rest out on her own.

Okay. Thank you for the warning.

1. To find the ratio of girls to total students, you need to divide the number of girls by the total number of students. In this case, there are 12 girls and a total of 18 (boys) + 12 (girls) = 30 students.

So, the ratio of girls to total students is 12:30.

Now, let's simplify this ratio. Both 12 and 30 can be divided by 6, so dividing both numbers by 6 gives us 2:5.

Therefore, the correct answer is A. 2:5 or 18:30 (after simplifying).

2. To determine which ratios are equivalent to 6:9, you can simplify the given ratios and check if they have the same simplified form.

Starting with ratio 6:9, we can divide both numbers by their greatest common divisor, which is 3. Dividing 6 by 3 gives us 2, and dividing 9 by 3 gives us 3. So, the simplified form of the ratio is 2:3.

Now let's check the given answer choices:
A. 3:2 - This ratio is not equivalent to 6:9 as the numbers are in a different order.
B. 18/27 - We can simplify 18/27 by dividing both numbers by 9, which gives us 2/3. This is equivalent to the simplified form of 6:9, so this choice is correct.
C. 30:45 - This ratio is not equivalent to 6:9 as the numbers are in a different order.
D. 24/32 - We can simplify 24/32 by dividing both numbers by 8, which gives us 3/4. This is not equivalent to the simplified form of 6:9, so this choice is not correct.

Therefore, the correct answer is B. 18/27.

3. To find the unit price for one CD, you need to divide the total cost of the CDs by the number of CDs. In this case, 3 CDs cost $29.85.

Dividing $29.85 by 3 gives us $9.95 per CD.

Therefore, the correct answer is C. $9.95.

4. To find how many words Milo can type in 7 minutes, you need to multiply his typing speed (34 words/minute) by the number of minutes. In this case, Milo types 34 words per minute and wants to know the number of words in 7 minutes.

Multiplying 34 words/minute by 7 minutes gives us 238 words.

Therefore, the closest answer is A. 245 words.

Hope this helps!