Ms.johnson and ms.siple folded a total of 300 cards. the ratio of ms.johnson cards folded to ms. siple is 2: 3 how many did each person fold?

The ratio of Ms.Johnson to the total is 2:5
The ratio of Ms. Siple to the total is 3:5

2/5= x/300
x=120

3/5= x/300
x= 180

Final Ms Johnson=120, Ms Siple= 180

I think it is the last one b.c. the first part of the equation//(2x+5)(2x-5) = 16x^4-625 b.c of the fomrmula x^2-y^2...
the last part i is most likely imaginary number which has a value of -1...but you want x^2 - y^2 remember (16x^2-625) so then its the last one
Hope that helps