Answer:
1/5=10/50
2/9=20/90
Step-by-step explanation:
1/5 is just a simpler way of saying 10/50 same as 2/9
using formula that cos= b/h
there is some of it sorry cant realy help
3x+2x=5x 5*5=25
dont worry you'll find one but for now you need to focus on you and your education
