when you have a function that is 4/6 think of it as reversed the number its going to be 4/6=6×4.
 
        
             
        
        
        
Step-by-step explanation:
This is the answer of this question.
 
        
             
        
        
        
Answer:
 -13x+10
-13x+10
Step-by-step explanation:
(4x+5)(x-2)
Multiply each term in the first parenthesis by each term in the second (foil)
Step 1: Expand it by writing out each multiplication. I added a picture showing which order to do it. (go in order of green, red, blue, yellow.) (you can remember this as first, outside, inside, last.) 
When you expand it'll look like: 4x⋅x+4x⋅-2-5x-5⋅-2
Step 2: Calculate product
4x⋅x+4x⋅-2-5x-5⋅-2 (for the 4x⋅x it would be written like  )
)
     +4x⋅-2-5x-5⋅-2
+4x⋅-2-5x-5⋅-2
 +4x⋅-2-5x-5⋅-2 (4x⋅-2 becomes -8x) (multiply 4x times -2)
+4x⋅-2-5x-5⋅-2 (4x⋅-2 becomes -8x) (multiply 4x times -2)
 -8x-5x-5⋅-2
-8x-5x-5⋅-2
 -8x-5x-5⋅-2 (-5⋅-2 becomes +10) (multiply -5 times -2)
-8x-5x-5⋅-2 (-5⋅-2 becomes +10) (multiply -5 times -2)
 -8x-5x+10
-8x-5x+10
Step 3: collect like terms
 -8x-5x+10 (-8x-5x becomes -13x) (-8x times -5x)
-8x-5x+10 (-8x-5x becomes -13x) (-8x times -5x)
 -13x+10 is the most simplified so it should be your final answer
-13x+10 is the most simplified so it should be your final answer 
 
        
             
        
        
        
Change in y over change in x
        
             
        
        
        
Here's your answer, I hope you understand this. 30.9cm