Help asap, 22 points for whoever helps me

4x+8y=64

8x+16y=128

4x/4=64-8y/4

X=64-8y/4

x=16-8y

8(16-8y)=128

128-64=128

-64y/-64=128-128

y=0

x=16-8(0)

X=16

The inequality shows that there x makes up the 10-point scores, and y makes up the 20-point scores. To know which of the choices cannot be true, we can analyze each choice:

A. It is not possible to have a fraction of a score, so this must be true.
B. They must be positive numbers. 
C. Similar to B, they must be positive numbers.
D. Even with a value less than 5, the inequality can be met. 

Therefore, the correct answer is D.