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math grade 10 applied

math grade 10 applied
by Jess,W on 09/14/05 at 20:15:42

[color=Purple]ok i have to find the value of x in each proportion
The following is what i came up with any suggestions on how to improve or better understand this would be most appreciated , im not asking anyone to do my work for me just to what im doing wrong thnx.[/color]
(psst. the answers ar ein the back of my book but they dont give me the "work" just the answer so i cant cheat)

[color=Red]A) 3/4=x/8
     8x=(3)(4)
       x=6

B) 2/3=10/x
    3x=(2)(10)
       x= 15

C) 1/4=7/x
    4x=(1)(7)
       x=21

D)  2/15=6/x
      15x=(2)(6)
          x=92[/color]


Re: math grade 10 applied
by princess on 09/14/05 at 20:19:11

[quote author=Jess,W link=board=general;num=1126743343;start=0#0 date=09/14/05 at 20:15:42][color=Purple]ok i have to find the value of x in each proportion
The following is what i came up with any suggestions on how to improve or better understand this would be most appreciated , im not asking anyone to do my work for me just to what im doing wrong thnx.[/color]
(psst. the answers ar ein the back of my book but they dont give me the "work" just the answer so i cant cheat)

[color=Red]A) 3/4=x/8
     8x=(3)(4)
       x=6

B) 2/3=10/x
    3x=(2)(10)
       x= 15

C) 1/4=7/x
    4x=(1)(7)
       x=21

D)  2/15=6/x
      15x=(2)(6)
          x=92[/color][/quote]

i just posted that before i registered


Re: math grade 10 applied
by Robert Fogt on 09/15/05 at 01:09:16

Using a calculator and basic algebra you can do it.

3/4 = x/8

First use your calculator to divide 3 by 4.

0.75 = x/8

Now multiply both sides by 8
(0.75) * 8 = (x/8) * 8

The 8's cancel on the right side, and 0.75 * 8 = 6

6 = x

Remember when you see a fraction such as 3/4 it is just a matter of 3 divided by 4. Though I will be the first to admit that I am a terrible teacher, and I may not present the easiest method.


Re: math grade 10 applied
by Ron Hoover on 09/19/05 at 13:41:50

1) 3/4 = x/8
a) mult both sides by 8 to get x alone
(3)(8)/4 = (X)*(8)
24/4 = x
x = 6

Your Solution looked OK to me

2) 2/3 = 10/x
a) mult both sides by X
(2) (x) /3 = 10(x) /x
(2) (x) /3 = 10  'REM x'x Cancel
b) mult both sides by 3
(2) (x) (3) /3 = 10 *3
2x = 30
c) Divide both sides by 2
2x/2 = 30/2
x = 15


3)  1/4 = 7/x
Same question as  previous

Multiply both sides by 4 and X to get rid of Fractions

4*X*1/4 = 4*X*7/x

cancel out the bottom

X*1 = 4*7
X = 28

3) same Problem as previous 2

Mult Both sides by 15X and then cancel out the numbers

you should get x = 45

hope this helps



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