Is this quadrilateral a parallelogram? Please help

Q1) jin loves carrot yesterday she ate ½ of here carrots and today she ate 2/3 of the remaining carrots. she then discover that she has 12 carrots left. yesterday she must has started with carrots? a)36 b)48 c)60 d)72

Bring the fraction a/a-4 to a denominator of 16-a^2

What is r i 4.5+10r=-6.5 with work pls