The correct answer is
9x^2/10y^3
4a-9b=22
substitute b=-2
4a -9(-2) = 22
4a +18 =22
subtract 18 from each side
4a = 4
divide by 4
a =1
Choice C
Answer:
(a) The ones that are equivalent to the given fraction are:
and 
(b) The one that is equivalent to the given fraction is:
I would believe it to be option 2 Because (m) will be meals but for it to be less would be 500+15m>1000+5m