Question 633277
x		Rate per mile						
y		daily charge						
Total	memberships							
180	x	+	4	y	=	180.20	.............1	
								
625	x	+	5	y	=	253.75	.............2	
Eliminate	y							
multiply (1)by		-5						
Multiply (2) by		4						
-900	x		-20	y	=	-901		
2500	x	+	20	y	=	1015		
Add the two equations								
1600	x				=	114		
/	1600							
x	=	0.07	
0.07 *100 = 7 cents/mile					
plug value of			x	in (1)				
180	x	+	4	y	=	180		
13		+	4	y	=	180		
			4	y	=	180		-13
			4	y	=	167		
				y	=	42

7 cents per mile & $42 per day