Answer:
8.6
Step-by-step explanation:
You need to use the Patagorean theorem! :) Just do seven squared and five squared add them up and then square root them!!
 
        
                    
             
        
        
        
Answer: i couldn’t find the answer to this one either
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x=9 and y=3
Step-by-step explanation:
Let's solve your system by substitution.
−4x+6y=−18 and y=−2x+21
Rewrite equations:
y=−2x+21;−4x+6y=−18
Step: Solve  y=−2x+21for y:
y=−2x+21
Step: Substitute−2x+21foryin−4x+6y=−18:
−4x+6y=−18
−4x+6(−2x+21)=−18
−16x+126=−18(Simplify both sides of the equation)
−16x+126+−126=−18+−126(Add -126 to both sides)
−16x=−144
−16x
−16
=
−144
−16
(Divide both sides by -16)
x=9
Step: Substitute9forxiny=−2x+21:
y=−2x+21
y=(−2)(9)+21
y=3(Simplify both sides of the equation)
Answer:
x=9 and y=3
 
        
             
        
        
        
Divide each one out to see which is cheaper.  4.39/12 = .37 cents per pint while 2.89/8 = .36 cents per pint.  These are cost per unit problems.The second choice is the cheaper of 2 by a cent.  
        
             
        
        
        
It will be 3:45. You can find this by going ahead 3 hours, then going ahead a half an hour.