Jamaal has 20 models of cars and planes. He has 3 times as many cars as planes. What is the ratio of cars to total models? Mutiply its what 20X20X20
        
                    
             
        
        
        
Answer:
14x + 4
Step-by-step explanation:
3(4x+2) + 2(x-1)
Distribute by multiplying into the bracket 
=12x + 6 + 2x - 2 
Group like terms by adding and subtracting 
= 14x + 4
 
        
                    
             
        
        
        
X^2 - 8x-9=0 
D = b^2- 4*a*c = 64- 4* (-9) = 64+36=100 =10^2 
X1 = (8-10)/2 = -1 
X2= (8+10)/2= 9 
        
             
        
        
        
Answer:
B = 1.875
Step-by-step explanation:
given that A varies directly as B and inversely as C then the equation relating them is
A =  ← k is the constant of variation
 ← k is the constant of variation
to find k use the condition A = 12 when B = 3 and C = 2 , then
12 =  ( multiply both sides by 2 to clear the fraction )
 ( multiply both sides by 2 to clear the fraction )
24 = 3k ( divide both sides by 3 )
8 = k
A =  ← equation of variation
 ← equation of variation
when A = 10 and C = 1.5 , then
10 =  ( multiply both sides by 1.5 )
 ( multiply both sides by 1.5 )
15 = 8B ( divide both sides by 8 )
1.875 = B
 
        
             
        
        
        
Answer:
75 is the length of the third side