math

can someone answer these ive been stuck on them for almost 2 hours !!!!!

1.which pair of ratio form a proportion? choose all that apply.

A. 1/6, 4/20
B. 7/9, 28/36
C. 14/18, 21/27
D. 30/80, 8/18

2.which pair of ratios does not form a proportion?

A. 3/5, 24/40
B. 30/10, 15/3
C. 9/14, 3/4
D. 7/12, 14/24

3.for which value of m is 4/16=m/24 a proportion?

A. m=6
B. m=8
C. m=12
D. m=14

asked by annabelle
  1. (7/9)(4/4) = 28/36
    14/18 (3/2 / 3/2) = 21/27

    The easy way is to use your calculator, for example 14/18 = .777777..... and 21/27 =.77777.....
    but
    30/80 = .375 and 8/18 = .4444...

    2.
    3*6 = 24 but 5*6 = 30 not 40
    30/2 = 15 but 10/5 = 5 not 3
    14/3 no way
    but
    7*2 = 14 and 12*2 = 24 YES

    3.
    16 m = 4*24
    m = 6

    check
    4/16 = 1/4
    6/24 = 1/4 yes

    posted by Damon
  2. 1. is b and c

    posted by Julio
  3. 1. b., c.
    2.c
    3.a
    4.d
    5.b

    posted by Yo tengo
  4. Nice name YO TENGO BUT DO YOU KNOW DA WEY

    posted by Anonymous
  5. Nice name YO TENGO BUT DO YOU KNOW DA WEY

    posted by Anonymous
  6. Yo Tengo's right! Thanks, dude! :)

    posted by M'name (is) Jeff!
  7. Yes Bradda, Da Wey is dis wey.

    posted by Yo Tengo
  8. thanks yo tengo

    posted by khalissi
  9. No problem friend

    posted by Yo tengo
  10. Gotta love Flamingo

    posted by blorp
  11. thanks Yo Tengo

    posted by struggles
  12. @Blorp Of course, My good sir. Yo tengo to you. @struggles no problem, just helping out other kids who like to be bad and not learn anything (Im including myself so dont get mad at this comment) :D

    posted by Yo tengo

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