Only the top one is equivalent to c/(13a)
The rule is (a^b)/(a^c)=a^(b-c)
The answer you are looking for is 3/11 because you can divide both numbers by five without having to further simplify it
Part A: $1920 because if you change 20%to .2 then .2*1600= 320 and 320+1600=1920
Part B: $320 because 1600/5=320 that is after taxes, before taxes it is $384 because 1920/5=384 you divided it by 5 because it is 1/5, so you divide it by 5 and then multiply it by 1 because 1/5=y/1600 so find y which is what he out in the savings account
The solution for the #23 equation is either x=9 or x= -3