# Math Help!!!

posted by Callie

Use cross products to determine which of the following pairs of ratios cannot form a proportion.
A. 1/3*3/9
B. 2/3*4/9
C. 2/3*4/6
D. 1/3*2/6

Yes B.

1/3 * 3/9 = 1*9 and 3*3 = 9 and 9
2/3 * 4/9 = 2*9 and 3*4 = 18 and 12
2/3 * 4/6 = 2*6 and 3*4 = 12 and 12
1/3 * 2/6 = 1*6 and 3*2 = 6 and 6

So B is the correct answer.

I hope this helps! :)

2. Callie

Thank you

You're welcome, Callie.

## Similar Questions

1. Write the following ratio in simplest form: 32 min:36 min 8:9 8:36 32:9 128:144 2. Marie saved \$51. On Wednesday, she spent \$8 of her savings. What ratio represents the portion of her total savings that she still has left?
2. ### Math

Which ratios does NOT form a proportion? 1. 24/96 , 27/108 2. 17/102 , 12/70 3. 21/51 , 35/85 4. 45/75 , 63/105 Which ratios form a proportion?
3. ### Math

1. Write the following ratio in simplest form: 32 min:36 min 8:9 8:36 32:9 128:144 2. Marie saved \$51. On Wednesday, she spent \$8 of her savings. What ratio represents the portion of her total savings that she still has left?
4. ### Math

1. Write the following ratio in simplest form: 32 min:36 min 8:9 8:36 32:9 128:144 2. Marie saved \$51. On Wednesday, she spent \$8 of her savings. What ratio represents the portion of her total savings that she still has left?
5. ### MATH HELP

1. Which ratios form a proportion? Use equivalent ratios to test each pair. A. 4/9, 2/3 B. 6/15, 9/12 C. 12/16, 15/20 D. 18/ 20, 24/30 2. Which ratio forms a proportion with 20/30?

1. Write the following ratio in simplest form: 32 minutes: 36 minutes A. 8:9 B. 8:36 C. 32:9 D. 128:144 I chose: A 2. In a sports equipment locker, there are 81 balls and 45 baseball mitts. Write the ratio of balls to mitts in simplest …
7. ### math plz help!!!!!!!

which ratios form a proportion? A) 4/5 , 20/25 B) 8/12 , 18/24 C) 1/3 , 7/24 D) 2/5 , 6/16 which ratio forms a proportion with 9/15?
8. ### math

#1)Which ratio forms a proportion? Use cross products to test each pair. (A)15/40, 35/90 (B)18/22, 45/55 (C)12/55, 33/121*** (D)17/31, 32/45 #2)Which ratio forms a proportion with 20/30?
9. ### Math

Which ratios form a proportion? a. 4/9, 12/25 b. 3/7, 18/42 c. 5/11, 20/45 d. 5/8, 15/25 Which ratio forms a proportion with 18/30?
10. ### Math

1. Which ratios form a proportion? (1 point) a. 3/15, 12/55 b. 8/24, 12/35 c. 5/18, 25/90 ***?

More Similar Questions