MathYouLike MathYouLike
  • Toggle menubar
  • Toggle fullscreen
  • Toggle Search
  •    Sign up
  • QUESTIONS
  • TAGS
  • USERS
  • BADGES
  • ASK A QUESTION
  • BLOG
  • Profile
  • Activity
  • Summary
  • Answers
  • questions
Answers ( 30 )
  • See question detail

    Number of female students is:         

    \(50\cdot\dfrac{2}{5}\)=20 ( students )

    Number of male students is :   50 - 20 = 30 ( students )

                                                   Answer : 30 students

  • See question detail

    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)

  • See question detail


    MCP Yesterday at 15:07

    We 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

  • See question detail

    AVERAGE IS:

    (45+126+51+549+83+84+169+545):8=206.5

    ĐS:206.5

  • See question detail

    The biggest cake that he can get from the store is:


                                              30: 3 = 10 (pastry)

                                                      Answer: 10 cakes

  • See question detail


    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

  • See question detail

    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)

  • See question detail

    Change : half an hour = 0,5 hour

    The speed of the car is :

       ( 25 - 5 ) : 0,5 = 40 ( km / hour )

    Answer : 40 km / hour

  • See question detail

    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. 

  • First
  • 1
  • 2
© HCEM 10.1.29.225
Crafted with by HCEM