Question

PLS HELP ME ASAP GUYS FOR 1, 2, and 3 PLS (SHOW WORK!!) + LOTS OF POINTS!

Answer 1

1. B forms a proportion, this is what I did, i simply 10/18 to 5/9 and i try to see if 5/9 is equivalent to 25/45 and it is. 5/9*5/5= 25/45

2. You multiply 27*4=108 then 108/12=9 so a=12

3. you multiply 16*21=336 then 336/12=28 so b=28

Hope this helps!