Help Please!!!!!

[santasad13]

i am in 7th grade and taking my sat early and i cant understand any of the math and i only have 2 days to study!!!!! PLEASE HELP!!!!!!!!!

Qs like if x exponent 3\2=64,x=?

 

[happy]

Um, post problems to get help.

 

[stapel]

[can't] understand any of the math and only have [two] days to study!

I'm sorry, but the reason it took your school years to cover the math that will be reviewed on that test is, in part, because the material cannot be taught in a simple posting.

If you really "can't understand any of the math", then I'm afraid there is little anybody can do for you at this point.

Eliz.

 

[Unco]

Qs like if x exponent 3\2=64,x=?

Write as: x^(3/2) = 64


Take the power of 2/3 of both sides:

\(\displaystyle \L\mbox{ \left(x^{\frac{3}{2}}\right)^{\frac{2}{3} = 64^{\frac{2}{3}}}\)

And exercise the exponent rules.

 

[stapel]

...if x exponent 3\2=64,x=?

Did you mean "x^3/2 = 64", or "(x³)/2 = 64", or something else?

Thank you.

Eliz.

 

[Denis]

Can you do this one sadsack? : x times 2x = 18 (solve for x)

 

[santasad13]

yes,dennis, it's 3. thanks for the help, guys. I found some more help, and i think i got it now.