Which is the equation of a parabola with focus (-5,3) and vertex (-5,6)?

In the triangle abc< angle c is a right angle. find the value of the trig function indicated. find tan a if a =12, b=5 a. 13/12 b. 12/13 c. 5/12 d.12/5

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Maurice has 54 fewer comic books than rebecca. they have 130 comic books together .how many comic books are in maurices collection ? how many comic books are in rebeccas collection