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look
a1 = -5
n=1
a2=20
n=2, etc..

This way you can eliminate A because term 2 doesn't match up... And I think Jhanny's right

thanks you that was heard

So we have a1 = -5, our r = -4 and plug it into our formula \[\large ar ^{n-1}\]

thanks bahrom :)

Can you help me with another

sure

What is the simplified form of the expression?|dw:1369539526178:dw|

we you know to solve \[\color{fuchsia}{\frac{ 33 }{ 4 }}-\color{green}{8}\]

|dw:1369539985575:dw|

That is the choices

hmm...something seems wrong here.

Ohh I see. hm, well what do you get when you reduce 33/4- 32/4? :D

I am confused

hm?

I have no Idea what the answer is

solve (33/4)-(32/4) and we'll work from there, you'; get your answer, promise :)

I am the parent of 2 children that is failing

this looks like greek to me..

ok, what is.... 3-2?

good :) so 33-32 works the same way, it is also 1.

So we now have \[\frac{ 1 }{ q ^{\color{blue}{1/4}} }\]

o ok

I thank you so much

algebra has always been my worst subject

It'll get better with practice :) Practice makes people perfect in math ^_^

I remember hearing that when I was young

I have another quesiton if you are up to it?

sure thing

Interesting

What is the simplified form of the expression?|dw:1369541274406:dw|

ok what do we do next

we're going to multiply 6 to the 3 AND the x^(7/2)

Are you able to do that?

18 x

I suck

A. 729x33
B. 3x33
C. 729x29
D. 3x29

ok

And adding 21 + 12 for the exponent, you'll get your answer. i've done the rest

Good luck with your other problems!

33

729x^33

am I right?

thanks so much