Muliply .15 to 828 and get your answer the add it to 828
        
                    
             
        
        
        
Step-by-step explanation:
5(tanx)^2 -2 +tanx=0
let tanx=y
5y^2 + y-2=0
y=0.5403 or y= -0.7403
tanx=0.5403
x=arctan(0.5403)
x=28.38°
or
tanx=-0.7403
x=arctan(-0.7403)
x=143.49°
 
        
             
        
        
        
So the actual meal was at most 130 dollars they paid minus the 20 dolars tip: 130-20=110 dollars. 
it was 5 people: Dolores+5 friends, who presumably all paid the same (buffet).
then we have to divide the 110 among the 5 people: it's 110/5=22
so each of them paid at most 22 dollars:
x (the amount they paid)≤22 
        
             
        
        
        
Answer:
$40
Step-by-step explanation:
12 ÷ 3 = 4
4 × 10 = 40
So, the answer is $40.
<h2><u><em>
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