Answer:
y = -3x + 9
Step-by-step explanation:
y = mx + b where m is the slope and b is the y intercept
The hypotenuse is on the same line as BC but twice as long.  So extend that line up and it will cross the y axis at (0,9).  9 will be your y intercept.
To find the slope start at C and count  up 9 and to the left 3 to get to B.
So the slope is rise/run or 9/(-3) = -3.
Final equation would be y = -3x + 9
 
        
             
        
        
        
<span>b. 4+12÷2=4+6=10
 c. (20–5)•3=15•3=45</span>
        
             
        
        
        
The correct answer is 16/81. Hope this helps.