# Math Help - Miscellaneous questions

1. ## Miscellaneous questions

Need help on these, need explanation too please.

1.Which of the following is equavlant to (2z^3)/(8z^(n-2))
a. 1/4z^1-n
b. z^5-n
c. 1/4z^(5-n)

2.Find the range of negative squareroot (36-x^2)
so far I gotten (x+6)=-6 and (x-3)=6 so would it be y:y -6<y<6?

3. Find all solutions for sin^2=3cos^2

4. Suppose -2x+y=4 and 3x-5y=-6 whats y/x=

2. Originally Posted by goldenroll
Need help on these, need explanation too please.

1.Which of the following is equavlant to (2z^3)/(8z^(n-2))
a. 1/4z^1-n
b. z^5-n
c 1/4z^(5-n)
$\frac{2z^3}{8z^{n-2}}=\frac{2z^{3-(n-2)}}{8}$

Simplify that and see what you get.

Also in future use brackets to make what you type unabiguous, otherwise you are unlikely to get much help.

CB