Answer:
85%
Step-by-step explanation:
If she got 3 wrong then it means she got 20-3 right, so she got 17 questions right. 
From there we get the fraction: 17/20 
To make the a percentage we times both the top and bottom by 5 (because 20 x 5 = 100) 
By doing that we get 17x5/20x5
= 85/100
That is equal to 85%
 
        
             
        
        
        
Answer:
looks like A, first answer, is correct when using n such that it names what value of the sequence to use like a1 = 4 and so on.
Step-by-step explanation:
 
        
             
        
        
        
Add EF and DE together to equal 32
2x-10 + 4x = 32
Combine like terms;
6x-10 = 32
Add 10 to each side:
6x = 42
Divide both sides by 6:
x = 42/6
X = 7
EF = 2x-10 = 2(7)-10 = 14-10 = 4
DE = 4x = 4(7) = 28
 
        
             
        
        
        
Answer:
Step-by-step explanation:
What you do is try to find l by using the given information.
We can start by saying that 
A=L*W
Now it's easy algebra
Divide both sides by W
L=A/W
Area and length are given .
A=((m^3-3m+2)/2m^2-7m+3)/(m^3+m-2)/(2m^3+3m-2)
Try to work it out if you can't then tell me in the comments we'll figure it out.