What is the value of y in the parallelogram below

The sum of any two adjacent angles of a parallelogram is 180° ⇒
angle adjacent to 64° = 180 - 64 = 116° 

In a parallelogram opposite angles are equal ⇒

4y + 12 = 116
4y = 116 - 12
4y = 104
y = 104/4
y = 26  ← answer.

The length of what is left would be 1 1/2 feet long.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.