If a, b,c, d are replaced by four different digits from 1 to 9, inclusive, then what's the largest possible value for a. bc + 0.d ?

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?