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Number of female students is:
\(50\cdot\dfrac{2}{5}\)=20 ( students )
Number of male students is : 50 - 20 = 30 ( students )
Answer : 30 students
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To be able to buy 9 bottles of fruit juice at the cheapest price, they should appoint 4 people to buy 8 bottles for: (7 + 1) x 4 = 32 (dollars)
The total amount they will pay to buy 9 bottles is: 32 + 7 = 39 (dollars)
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MCP Yesterday at 15:07We have :
2a+b+c+da=a+2b+c+db=a+b+2c+dc=a+b+c+2dd2a+b+c+da=a+2b+c+db=a+b+2c+dc=a+b+c+2dd
⇒2a+b+c+da−1=a+2b+c+db−1=a+b+2c+dc−1=a+b+c+2dd−1⇒2a+b+c+da−1=a+2b+c+db−1=a+b+2c+dc−1=a+b+c+2dd−1
⇒a+b+c+da=a+b+c+db=a+b+c+dc=a+b+c+dd⇒a+b+c+da=a+b+c+db=a+b+c+dc=a+b+c+dd
+> If a + b + c + d ≠0≠0
=> a = b = c = d (Because the same of namerator)
=> M = 1 + 1 + 1 + 1 = 4
+> If a + b + c + d = 0
=> a + b = -(c + d)
b + c = -(a + d)
c + d = -(a + b)
a + d = -(b + c)
Change this into M , we have :
M=a+bc+d+b+cd+a+c+da+b+a+db+cM=a+bc+d+b+cd+a+c+da+b+a+db+c
M=−(c+d)c+d+−(a+d)a+d+−(a+b)a+b+−(b+c)b+c=(−1)+(−1)+(−1)+(−1)=−4M=−(c+d)c+d+−(a+d)a+d+−(a+b)a+b+−(b+c)b+c=(−1)+(−1)+(−1)+(−1)=−4
So M = 4 and M = -4
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AVERAGE IS:
(45+126+51+549+83+84+169+545):8=206.5
ĐS:206.5
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The biggest cake that he can get from the store is:
30: 3 = 10 (pastry)
Answer: 10 cakes -
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20 hour before (20:10)Number of female is : 60 x 3 : 5 = 36 ( student )
Number of male is : 60 - 36 = 24 ( student )
Answer : 24 student
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The edge length of the cube is :
\(\sqrt[3]{216}\)= 6 (cm) because 6 x 6 x 6 = 216
The area is :
6 x 6 = 36 (cm2)
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Change : half an hour = 0,5 hour
The speed of the car is :
( 25 - 5 ) : 0,5 = 40 ( km / hour )
Answer : 40 km / hour
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a) Five fractions equals 3/5: 6/10; 9/15; 12/20; 15/25; 30/50.
b) Five fractions equals 5/8: 10/16; 15/24; 20/32; 25/40; 50/80.
c) Five fractions equals 36/108: 1/3; 2/6; 3/9; 12/36; 18/54.