Fill in the blanks:

1. Consider the equation x"2 /81 + yA2 /16 =1 The graph passes through ______and ______ passes through _______and ________ which are the co-vertices .

2.In the equation (x^2+10x)+(y^2-2y)=-13 we complete the squareroot of x by adding _____of y by adding________within the second parenthesis.thus we must add29 to the tight side of equation

3.the graph of (x-4)^2/9 + (y+1)^2/25=1 has its center at _________