exam Maths Puzzle Numerical Ability

Need help with this question. Find the domain and range of the reation R= {(x,y)| y<= 2x, x and y positive integers less than 6}.

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PRETTY PLEASE AGAIN
consider the circle given by x^2 + (y+1)^2=9
a)
Give the center aND RADIUS OF THE CIRCLE
CENTER?_______________
rADIUS?________________
Joseph has 4 times as many quarters as he does dimes. If he has a total of $2.65, how many of each type of coin does he have?