Answer:
a = 7, b = 
Step-by-step explanation:
Using the sine ratio in the left right triangle and the exact value
sin45° =  , then
 , then
sin45° =  =
 =  =
 =  ( cross- multiply )
 ( cross- multiply )
a ×  = 7
 = 7 ( divide both sides by
 ( divide both sides by  )
 )
a = 7
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Using the tangent ratio in the right triangle on the right and the exact value
tan60° =  , then
 , then
tan60° =  =
 =  =
 =  =
 =  ( multiply both sides by b )
 ( multiply both sides by b )
b ×  = 7 ( divide both sides by
 = 7 ( divide both sides by  )
 )
b =  ×
 ×  =
 = 
 
        
             
        
        
        
Answer:
I think the answer is 7.2
 
        
             
        
        
        
Its 8$ per hour or 8/1 hour because if you line it up every hour it increases by $8
        
                    
             
        
        
        
Answer:
18.
Step-by-step explanation:
1) formula of the perimeter given in the condition is:
p=2(VW+XV) or p=2(VY+XY).
Note, VW=XY and XV=VY;
2) if to substitute p=84, VW=2z+2 and XV=3z into the formula above, then
2(2z+2+3z)=84, ⇔ 5z+2=42; ⇒ z=8.
3) if z=8, then VW=2z+2=2*8+2=18.