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Old 01-22-2011, 11:46 AM   #1
Captain Morgan
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Default Anyone here a math genius?
A friend on facebook posted this problem from her son's 6th grade math. I'm clearly an idiot, cause I can't figure it out.

If y*=3y-1, then what is 3*+5?

Seems to me that you have to solve for the y and also for the exponent, but I can't figure out how.
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Old 01-22-2011, 11:58 AM   #2
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A friend on facebook posted this problem from her son's 6th grade math. I'm clearly an idiot, cause I can't figure it out.

If y*=3y-1, then what is 3*+5?

Seems to me that you have to solve for the y and also for the exponent, but I can't figure out how.
What does the "*" represent? Never mind I get it... you think you're dumb! Hahahaha
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Old 01-22-2011, 01:10 PM   #3
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Is y* supposed to be y^x where x is a variable?
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Old 01-22-2011, 01:13 PM   #4
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Is y* supposed to be y^x where x is a variable?
yeah what was said above, the way you got it typed doesn't make sense and it's like his teacher made shit up. * is generally thought of as multiplication.
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Old 01-22-2011, 01:18 PM   #5
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yeah what was said above, the way you got it typed doesn't make sense and it's like his teacher made shit up. * is generally thought of as multiplication.
Yep.... At first glance I was like WTF! I ASSume that * means "x" as in y to the x power.
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Old 01-22-2011, 01:21 PM   #6
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yeah what was said above, the way you got it typed doesn't make sense and it's like his teacher made shit up. * is generally thought of as multiplication.
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Yep.... At first glance I was like WTF! I ASSume that * means "x" as in y to the x power.
That's what I initially thought as well. but yeah, I also think it should be written as:

If y^x = 3y-1, then what is (3^x) + 5?
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Old 01-22-2011, 01:28 PM   #7
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I dont think that was copied right, if solve for x you get a complex number.
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Old 01-22-2011, 01:29 PM   #8
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That's what I initially thought as well. but yeah, I also think it should be written as:

If y^x = 3y-1, then what is (3^x) + 5?
I keep coming up with 12.5...

y=2
x=2.5
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Old 01-22-2011, 01:38 PM   #9
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I dont think that was copied right, if solve for x you get a complex number.
yep, there is some math in there that is not 6th grade level, i think there is some missing info that the teacher gave. I don't remember logarithms that early.
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Old 01-22-2011, 01:38 PM   #10
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I put it in Wolfram Alpha to see if I was missing something.
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