Answer:
20 
step by step explanation:
 
        
                    
             
        
        
        
Answer:
x=4.34 seconds
Step-by-step explanation:
-16x^2+70x-2=0

x=4.34
 
        
             
        
        
        
The answer to this is Complementary Angles. 
        
                    
             
        
        
        
Answer:
Area
Step-by-step explanation:
If you are paving the parking lot, you would need every sqaure inch of the parking lot, not only the outside (which is what the perimeter is)
 
        
             
        
        
        
4x=-3y+17 becomes 4x+3y=17
4x+3y=17
3x-4y=-6
alrighty
elimination
muliply first equation by 4 and 2nd by 3 and add them
16x+12y=68
9x-12y=-18
add them
25x+0y=50
25x=50
idivide both sides by 25
x=2
sub back
3x-4y=-6
3(2)-4y=-6
6-4y=-6
-4y=-12
y=3
(x,y)
(2,3)