Sorry about the bad handwriting
Answer:

Step-by-step explanation:
Given



Required
Determine the percentage of protein
First, we need to calculate the total:



Percentage of protein is calculated as thus:




The answer is 4/8 because half of 16 is 8 and half of 8 is 4, therefore they are equivalent
Answer:
An infinite number of solutions
Step-by-step explanation:
This is because of all the 0's the zeros represent none and none is infinite. When in the matrix you are solving and solving is a infinite. When times 0 is 0 and when divided by 0 is infinite so an infinite amount of answers.