anonymous
  • anonymous
can someone please help me with this problem please
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
I am suposse to smplify it |dw:1330211637642:dw|
anonymous
  • anonymous
|dw:1330211747318:dw|
anonymous
  • anonymous
|dw:1330211833532:dw|

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anonymous
  • anonymous
and (3xy^2) (-7x^2y^4) I am suppose to multipy this and I have no cluse how to
AccessDenied
  • AccessDenied
Property of Multiplying exponents of the same base: \[ a^{m} a^{n} = a^{m + n} \] -7 * 3 = -21 x * x^2 = x^(1+2) = x^3 y^2 * y^4 = y^(2+4) = y^6
anonymous
  • anonymous
because I got 21x^3y^6 but I dont think it is right
cathyangs
  • cathyangs
multiply the like parts: 3 goes with -7, x with x, and y with y.
cathyangs
  • cathyangs
you missed the negative is all. :D
anonymous
  • anonymous
how do I Write 625 in exponential notation
cathyangs
  • cathyangs
you mean in scientific notation?
cathyangs
  • cathyangs
or in prime factorization?
anonymous
  • anonymous
no it says expontial notation
AccessDenied
  • AccessDenied
Exponential notation is scientific notation, I believe. a * 10^b, where 1 <= a <= 9, and a,b are integers
cathyangs
  • cathyangs
...ok, I'm guessing that's the same as scientific. The first part has to be a number between 1 and 9, which in your case is 6.25. Because you have to multiply 6.25 by 100 to get 625, it's 6.25*100, or 6.25*10^2 in scientific notation.
AccessDenied
  • AccessDenied
oops, I should say, a is not integer! I forgot! D:
cathyangs
  • cathyangs
alternately, you can think of it as: from 6.25 to 625, you have to move the decimal back 2 places, so it's 10^2.
cathyangs
  • cathyangs
well, a can be an integer, but doesn't have to.
anonymous
  • anonymous
how do you work this kind of problem ? |dw:1330212185975:dw|
cathyangs
  • cathyangs
(a/b)^x = (a^x)/(b^x). You can apply this to that equation.
anonymous
  • anonymous
because I got 9/16 is that right ?
cathyangs
  • cathyangs
try again.
anonymous
  • anonymous
I got this time 6/16
cathyangs
  • cathyangs
...? Make sure you do the inner parentheses first.
anonymous
  • anonymous
now I got 1/2
cathyangs
  • cathyangs
that's right. gj!

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