Question

The ratio of X:Y is 1:5, respectively. When Y is 125,X is equal to: a. 5 b. 15 c. 25 d. 625 43. The missing number in the equation below is: 3/15=?/120 a. 24 b. 18 c. 12 d. 28 44. The missing number in the equation below is: 15:345=?:23 a. 2 b. 1 c. 3 d. 4

Answer 1

To find the value of X when the ratio of X:Y is 1:5, we can set up a proportion. In the equation 3/15 = ?/120, we can solve for the missing number by cross multiplying. In the equation 15:345 = ?:23, we can use a proportion to find the missing number.

Step-by-step explanation:

To find the value of X when the ratio of X:Y is 1:5 and Y is equal to 125, we can set up the following proportion:

1/5 = X/125

Cross multiplying, we get X = (1/5) * 125 = 25. Therefore, X is equal to 25.

The missing number in the equation 3/15 = ?/120 can be found by setting up the proportion:

3/15 = x/120

Cross multiplying, we get 3 * 120 = 15x. Solving for x, we have x = (3 * 120) / 15 = 24. So, the missing number is 24.

The missing number in the equation 15:345 = ?:23 can be found by setting up the proportion:

15/345 = x/23

Cross multiplying, we get 15 * 23 = 345x. Solving for x, we have x = (15 * 23) / 345 = 1. Therefore, the missing number is 1.