I think the answer is D because you have to move the decimal three times anyway, then you only need to add seven more zeroes to make it correct (in my opinion).
Su is the only child under 12 years of age, therefore, she is only child entering for free.
Answer: (30m-9n)/270
First we start with m/9-n/30.
We multiply the denominators to get 270.
Then we multiply the numerators by the original denominators to get (30m-9n).
To check, we can use m=2, and n=4
2/9-4/30=4/45
(30*2-9*4)/270=24/270=4/45
Y=3x-5
Y=5/4x+3/4
The solution to the equations is in the picture
4.56 rounded to the nearest whole number is 5
