posted by Krissy on .
I have a few more questions that I'm not understanding. Its multiple choice however I would appreciate a breakdown on how to solve.
4.Simplify the compound rational expression. Use either method. 1+(5/y-10)/y+(25/y-10)
5.Simplify the compound rational expression. Use either method. (2/a-1/3)/(4/a^2-1/9)
7.Use the properties of exponents to simplify the expression. Write the answer using positive exponents only
8.Evaluate (2x-4y)^2 given x=3 and y=-1.
4. none of the choices are correct
proof: let y = 1
1+(5/y-10)/y+(25/y-10) = 1 + (-5) + 5 = 1
none of the choices produce 1
perhaps you have the brackets incorrect
e.g perhaps the first bracket of (5/y-10)
could have been (5/(y-10) )
5. same thing in this one
you have a+3/3
why didn't they just say a + 1 ?
or was it (a+3)/3
Hard to second-guess
remember, (anything)^0 = 1
= -4(1) + 1 = -3
8. (2x-4y)^2 , when x=3, y=-1
= (6 + 4)^2