Tabbiejack
what is the simplified form of the expression (b/7)^2
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Tabbiejack
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|dw:1369532637410:dw|
Tabbiejack
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@satellite73 I need help
Tabbiejack
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please
Tabbiejack
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The choices are|dw:1369532959983:dw|
JBrandonS
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\[(\frac{b}{7})^2 = \frac{b^2}{7^2} = \frac{b^2}{49}\]
galacticwavesXX
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just square top and bottom on similar questions
Tabbiejack
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Thanks so much I have 2 other questions if you guys don't mind
Tabbiejack
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|dw:1369533436214:dw|
JBrandonS
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Pull out the coefficients and use \[x^ax^b=x^{a+b}\]
Tabbiejack
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I don't know this at all
I am a parent trying to give my 2 children some math for the summer so I am asking for the help because I have not done algebra in 25 years
JBrandonS
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Okay, well do you know what coefficients are?
Tabbiejack
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yes
JBrandonS
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Okay well then move those out so you get \[ 2*3x^6x^{1/2} \] and use the above formula.
galacticwavesXX
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the coefficients are the numbers in front of the variable
whenever you are multiplying variables with powers you always must add the powers together
galacticwavesXX
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what will the final answer be?
Tabbiejack
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6x^3
Tabbiejack
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\[6x ^{3}\]
JBrandonS
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You need to add the powers, not multiply. so \[6x^{6+1/2}\]
Tabbiejack
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ok so what is the answer
Tabbiejack
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I will give you the choices
galacticwavesXX
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the answer would be\[6x^\frac{ 13 }{ 2 }\]
JBrandonS
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I have given you the answer, there is only one thing you need to do... Do you know how to add fractions with whole numbers?
galacticwavesXX
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that is 6x^13/2
Tabbiejack
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so its \[5x \frac{ 13 }{2 }\]
Tabbiejack
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Guys I feel so old doing this
galacticwavesXX
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all you need to do is add the powers which is 6+.5 and you get 6.5 which is 13/2 in fraction form
so final answer would be 6x^13/2
Tabbiejack
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the dean at my children school said they were cheating so I have to give this these math test so that can get ready to take the big test to passed algebra
Tabbiejack
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this really means the world to me all the help from you guys
Tabbiejack
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I have another if your up for it!
galacticwavesXX
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bring it on
Tabbiejack
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|dw:1369534461113:dw|
galacticwavesXX
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on the top part is that C^9
Tabbiejack
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yes
Tabbiejack
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|dw:1369534620249:dw|
galacticwavesXX
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ok so this expression can be re-written as
\[\frac{ x^9 }{ d^7 }/\frac{ x^14 }{ d^10 }\]
which can be written as
\[\frac{ x^9 }{ d^7 }*\frac{ d^10 }{ x^14 }\]
the equation software on here is complexed but that is d^10 and x^-14
Tabbiejack
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that is not a choice
galacticwavesXX
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now what we can do is simplify the expression easier this way and we do this by subtracting the powers of the variable x and subtract the powers of the variable d
not finished yet
Tabbiejack
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o sorry
galacticwavesXX
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\[\frac{ x^9 }{ x^14 }=\frac{ 1 }{ x^5 }\]
andthe other one whic you get
\[\frac{ d^10 }{ d^7 }=d^3\]
combine and you get \[\frac{ d^3 }{ c^5 }\]
sorry the x should have been a C
galacticwavesXX
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if you can't see that it is d^3/c^5
Tabbiejack
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This one I tried but I got it wrong
is it B
Tabbiejack
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are you guys still with me?
galacticwavesXX
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yea my mom called for something but im back
Tabbiejack
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Write the recursive formula for the geometric sequence.
a1 = -2 a2 = 8 a3 = -32
A. an = -4 + an-1
B. an = -2 + an-1
C. an = -2 • an-1
D. an = -4 • an-1
Tabbiejack
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do you want me to open this up in a new question so I can give you an award
galacticwavesXX
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no im ok but i am looking at the sequences and none of them can i derive from the formulas given
galacticwavesXX
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ohh never mind i got it the answer should be D
Tabbiejack
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You rock
Tabbiejack
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I am going to open up another question I want to give you an award for helping me
galacticwavesXX
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haha thank you