1.In a group of six people,two have a mass of 60kg while three have a mass one and half times that.what is the mass of the sixth person if the average group mass is 70kg?2.There are x dimes and y nickels in bag A and x nickels and y dimes in bag B.Th
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1.In a group of six people,two have a mass of 60kg while three have a mass one and half times that.what is the mass of the sixth person if the average group mass is 70kg?2.There are x dimes and y nickels in bag A and x nickels and y dimes in bag B.Th
1.In a group of six people,two have a mass of 60kg while three have a mass one and half times that.what is the mass of the sixth person if the average group mass is 70kg?
2.There are x dimes and y nickels in bag A and x nickels and y dimes in bag B.The total value of the coins is the same for both bags.The combined number of coins in the 2 bags cannot be( )
A30 B40 C60 D80 E100
1.In a group of six people,two have a mass of 60kg while three have a mass one and half times that.what is the mass of the sixth person if the average group mass is 70kg?2.There are x dimes and y nickels in bag A and x nickels and y dimes in bag B.Th
(2*60+3*60*1.5+x)/6=70
(120+3*90+x)=420
420-120-270=x
x=30
x*0.1+y*0.05=x*0.05+0.1y
x=y
A包里的硬币数是x+y
B包里的硬币数也是x+y
A+B=2x+2y=4x
4x如果等于30的话 x就不是整数了
所以不可能