IF x+y=0, which of the following must be equivalent to x-y?

If 3x-y=12 , which of the following is equivalent to (y)/(3) ?

If x+y=90^(@) , which of the following must be true?

In the figure above, 2x = y. Which of the following is equivalent to z?

If x and y are positive integers and (2x +y) is even, which of the following must be even ?

root(5)(x^(15)y^(3b)) For all positive value of x and y, which of the following is an equivalent form of the expression above?

If xylt0 , which of the following must be true? I. x+y=0 II. 2x-2ylt0 III. x^(2)+y^(2)gt0

Given the right triangle above, which of the following is equivalent to (y)/(x) ?

If x-y=8, then which of the following must be true? Both x and y are positive.II.If x is negative,y must be positive III.If x is negative,y must be negative.(a) I only (b) II only (c) I and II (d) III only

If y=3^(x) and x and y are both integers, which of the following is equivalent to 9^(x)+3^(x+1) ?