Answer:
See explanation
Step-by-step explanation:
You are given the equation 
1. Add 8 negative x-tiles to both sides of the equation to create a zero pair on the left side. The equation then will have form

2. Add 5 negative unit tiles to both sides of the equation to create a zero pair on the right side. The equation now is

3. Divide both sides by 3:

3-2y-8x is it's most simplified form I think.
Answer: 11) 1/3
12)1/4
13) Likely
Step-by-step explanation:
Since the data is insufficient. Let us denote that n1 = 100, n2 = 100X1 = 38. X2 = 40
So looking for the p value:
p = (38+ 40) / (100 + 100) = 0.39
z = (38/100 - 40/100)/√ (0.39*(1-0.39)*(1/100 + 1/100))= -0.2899
P-value = P (|z| > 0.2899) = 0.7718