I believe it is the commutative property of multiplication. Commutative property is you can put the numbers in any order and it will have the same end result. I got multiplication because it is multiplication. 
Hope this helps!
 
        
                    
             
        
        
        
Answer:
Slope intercept: y = -3/2x + 1
Point slope: y + 2 = -3/2 * (x - 2) [Forgot to add the work for this, I will add it if you need it, feel free to ask.]
Step-by-step explanation:
m = (change in y)/change in x)
But also
m = y_2 - y_1/x_2 - x_1
So lets substitute
m = 1 - (-2)/0 - (2)
Lets find the slope
m = 3/0 - (2)
m = 3/-2
m = -3/2 (Moved the negative)
Now we find the value of b using the equation of a line.
y = mx + b
y = (-3/2) * x + b
y = (-3/2) * (2) + b
-2 = (-3/2) * (2) + b
Now we find the value of b
Lets rewrite
-3/2 * 2 + b = -2
Cancel the CF of 2
-3 + b = -2
Move the terms without b to the right
b = -2 + 3
b = 1
Now we substitute our values of the slope and y-int into y = mx + b to find the equation.
y = -3/2x + 1
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
Use a slope form.
<u>Slope:</u>

y₂ = (17)
y₁ = (1)
x₂ = (2)
x₁ = (-2)
Then, rewrite the problem.
Solve.

Therefore, the slope is 4, which is our answer.
I hope this helps you! Let me know if my answer is wrong or not.
 
        
             
        
        
        
Answer:
4.21
Step-by-step explanation:
Because 2.1 is also equivalent to  -4.2 which also is equivalent to D'.
 
        
             
        
        
        
Answer: Her measuring cup has 8.25 mL of medicine.
Step-by-step explanation:
As per given,
 In 11 mL of medicine, there are 20 drops.
That means quantity in 1 drop =  mL
 mL
Now , the quantity in 15 drops = 15 x quantity in 1 drop
= 

= 8.25 mL
Hence, her measuring cup has 8.25 mL of medicine.