In right triangle ABC, A=76º, a = 13, and C is the right angle. Solve the triangle.

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?