I know this is probably easy, but my brain isn't working.

The ratio of children to adults at a baseball game is 2 to 5. If there are 7,200 children at the game, which of the following could not be used to determine the number of adults, a?

2/5 = 7,200/a

2/a = 5/7,200

7,200/2 = a/5

a/7,200 = 5/2

Question

I know this is probably easy, but my brain isn't working.


The ratio of children to adults at a baseball game is 2 to 5. If there are 7,200 children at the game, which of the following could not be used to determine the number of adults, a?

 2/5 = 7,200/a

 2/a = 5/7,200

 7,200/2 = a/5

 a/7,200 = 5/2

ivettef365 · Answer

the ration is 2/5, so propotion would be

  2               7200  
----  =      ------
  5                  a

as long as you get to multiply the 7200 x 5 when you cross multiply then the equation is correct

ivettef365 · Answer

so which equation when you cross multiply you don't get 5 x 7200 ??

anonymous · Answer

So the answer to the question would be the second equation.

ivettef365 · Answer

correct, all others just change the order, but result is the same