Answer:
72km
Step-by-step explanation:
alex : tomos : annabelle = 2 : 3 : 4
if tomos drove 24km
tomos ratio is 3
so 3 --> 24
<em>1 --> 8 </em>
<u>total ratios --> 2 + 3 + 4 = 9</u> 
so total journey is 9 --> 9 * 8 = 72km
 
        
             
        
        
        
I'm thinking this is what the problem looks like: 

.  The first thing to do is to move the 

 over to the other side because it has a common denominator with the other side.  Doing that and at the same time combining them over their common denominator looks like this: 

.  The best way to solve for x now is to cross-multiply to get 3(4-x)=-4(x-4).  Distributing through the parenthesis is 12 - 3x = -4x + 16.  Solving for x gives us x = 4.  Of course when we sub a 4 back in for x we get real problems, don't we?  Dividing by zero breaks every rule in math that there ever was! So, yes, the solution is extraneous.
 
        
        
        
Answer:
32x - 8
Step-by-step explanation:
A = LW
A = (8x - 2)(4)
A = 32x - 8
 
        
                    
             
        
        
        
The variable for x is twenty eight
        
             
        
        
        
Answer: 
x-intercepts: (2,0), (4,0)
y-intercepts: (0,-8) 
Explanation: 
To find the x intercept(s), you must compute where y=0. So solve 0= -x^2 + 6x - 8. So, the x intercepts are: (2,0) and (4,0) since the solutions to the mentioned equation are x=2 and x=4. To find the y intercept(s) compute what is y when x=0. In this case, when x=0, y=-8. So the only y intercept is (0,-8).