Answer:
2x³+17x²+25x-50
Step-by-step explanation:
Standard Form: All your numbers and variables in order of the highest exponent.
(2x²+7x-10)(x+5)
We want to distribute x and 5 to every single value.
2x³+7x²-10x+10x²+35x-50
Simplify.
2x³+17x²+25x-50
This is standard form because the highest values are on the left (x³ is larger than x²). 
 
        
             
        
        
        
I am taking french but im only 7% fluent as of yet
        
             
        
        
        
Well you do 57 time 7 and get 399 and then it says how far will she have driven so you would add the 60 and get 459 miles. 
        
                    
             
        
        
        
Answer:
First then second answer below
Step-by-step explanation:
-x+y 4
-1/-1=1      x=1    y=1  
y/1=1/1+4/1
y=1x+4
-x+7y 21
-1/-1=1
7y/7=1/7+21/7
y=1/7x+3