Answer:
C. x=42
Step-by-step explanation:
16 + 3x + y = 180
126 + 16 + y = 180
y = 38
16 + 3x + 38 = 180
54 + 3x = 180
3x = 126
x=42

Point-slope form is
, where
is the slope and
is a point on the line.
Substitute in the values. 
Simplify the negative subtraction to addition. 
Answer:
The answer is "
"
Step-by-step explanation:






Eight phenotypes were present.
Df is provided also by a number of phenotypes -1 The degree of freedom

For p-value 0,9, Chi-square is 2.83;
The p-value of 0.75 is 4.5. Chi-square
Chi-sqaure value is observed at 2.965.
That means 0.90>p-value>0.75.