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Started By
Message
OT Math Buffs-Solve for X
Posted on 11/19/14 at 12:18 am
Posted on 11/19/14 at 12:18 am
X/5 = 3/X
11
Posted on 11/19/14 at 12:19 am to Breadstick Gun
x = sqrt of 15
Posted on 11/19/14 at 12:20 am to Breadstick Gun
x/5x = 3
5x/5x = 15
1 = 15
5x/5x = 15
1 = 15
Posted on 11/19/14 at 12:20 am to Breadstick Gun
288
Posted on 11/19/14 at 12:23 am to KosmoCramer
oh sorry misread that
This post was edited on 11/19/14 at 12:24 am
Posted on 11/19/14 at 12:24 am to SlowFlowPro
I figured you knew I was kidding when I said 1 = 15, not x = 15. 
Posted on 11/19/14 at 12:25 am to KosmoCramer
yeah i just saw that
Posted on 11/19/14 at 12:25 am to Breadstick Gun
Square root of 15
Posted on 11/19/14 at 12:25 am to Breadstick Gun
Eleventeen
Posted on 11/19/14 at 12:25 am to Breadstick Gun
3.8731
Posted on 11/19/14 at 12:25 am to KosmoCramer
quote:
x/5x = 3
5x/5x = 15
1 = 15
Posted on 11/19/14 at 12:25 am to Breadstick Gun
The real answer is:
X x X/5 = 3X/X
X^2/5 = 3
X^2 = 15
X = sq rt of 15
As someone said above.
X x X/5 = 3X/X
X^2/5 = 3
X^2 = 15
X = sq rt of 15
As someone said above.
Posted on 11/19/14 at 12:26 am to Fearthehat0307
quote:
x = sqrt of 15
My study guide says the sqrt of 15 or -15.
Just trying to get an understanding as to how you came to this conclusion in case there is one similar on the test.
I am finally finishing my degree and have a few classes left, but it's been 10 years since highschool and algebra classes
Posted on 11/19/14 at 12:27 am to Cosmo
yeah it's [3.9]
i think that's the symbol for +/-
i think that's the symbol for +/-
Posted on 11/19/14 at 12:27 am to Breadstick Gun
Posted on 11/19/14 at 12:27 am to Breadstick Gun
x = 3.872
Posted on 11/19/14 at 12:28 am to Breadstick Gun
All positive real numbers has two square roots, one positive square root and one negative square root. The positive square root is sometimes referred to as the principal square root.
Posted on 11/19/14 at 12:28 am to Breadstick Gun
quote:
My study guide says the sqrt of 15 or -15.
no no
the square root of -15 involves i
it's +/- 3.9 (rounded, obviously)
if you square 2 negative numbers, you get a positive. if you square 2 positive numbers, you get a positive, so it can be either -3.9 or 3.9
Posted on 11/19/14 at 12:28 am to soccerfüt
quote:
soccerfüt
Posted on 11/19/14 at 12:32 am to Fearthehat0307
quote:
x = sqrt of 15
X/5=3/X
X²=15
X=v15
This post was edited on 11/19/14 at 12:36 am
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