Answer:
Not sure if this is right, but I got $40.8. 
Step-by-step explanation:
I first turned 20% into a decimal. (0.20). 
Then I multiplied 0.20 and 34 which is 6.8. 
I then added 34 since it’s the original cost to 6.8 since that’s the tip amount. 
After that, you should get $40.8.
 
        
                    
             
        
        
        
Answer:
The value of X is 11
X=11
Step-by-step explanation:
 Isolate the variable by dividing each side by the factors that don't contain the cariable.
 
        
             
        
        
        
Answer:
x=39
Step-by-step explanation:
 
        
             
        
        
        
Perimeter is 
2 • width+ 2•length=
2• (4x-4)+2•(2x+5)=
Distribute multiplication in parentheses 
8x-8+4x+10=
Combine like terms 
12x+2
        
             
        
        
        
14.59
To solve, simply plug -7.1 into -Z. Since Z is negative in the equation, it will turn the Z that’s given to us into a negative. Since that Z is already negative, it will now become a positive since that’s what two negatives being multiplied make. This is what your problem will look like:
-(-7.1) + 7.49
7.1 + 7.49 = 14.59