Question 779602
Convert minutes to hours


beach cruiser	speed	=x	mph					
wind   	speed	=y	mph					
against  	wind   	0.4	hours					
with	wind   	0.15	hours					
								
Distance against 		2	miles	distance with 		2	miles	
t=d/r	against	wind   		-				
2.00	/	(	x	-	y	)=	0.40	
0.40	(	x	-	y	)	=	0.15	
0.40	x	-	0.40	y	=	2.00	....................1	
								
2.00	/	(	x	+	y	)=	0.15	
0.15	(	x	+	y	)	=	2.00	
0.15	x	+	0.15	y	=	2.00	...............2	
Multiply (1) by	0.15							
Multiply (2) by	0.40							
we get								
0.06	x	+	-0.06	y	=	0.30		
0.06	x	+	0.06	y	=	0.80		
0.12	x	=	1.10					
/	0.12							
x	=	9.17	mph					
								
plug value of x in (1)				y				
0.40	x		-0.40	y	=	2.00		
3.67			-0.40	-3.67	=	2.00		
-0.40	y	=	2.00					
-0.40	y	=	-1.67	mph				
	y	=	4.17					
beach cruiser	speed	9.17	mph					
wind   	speed	4.17	mph					
								
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