book Maths Puzzle Numerical Ability

I am having trouble with these problems:
1. If (x,y) is in quadrant 2, where is the point ((-1)^36x, (-1)^49y)?

2. Simplify the expression -5x^0 +7

3. What is the factor of

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book Other Question

I have a total of 35 coins consisting of dimes and nickels. THe value of these coins is $3.30. How many dimes and nickels do i have? SIMPLY THIS EQUATION

(a + b)^2 - (a - b)^2 divided by 2ab