Solve and check the solution is c = how many extraneous solutions are there?

The coordinate grid shows points a through k. which points are solutions to the system of inequalities listed below? 2x+ ys 10 2x 4y < 8 oa c, d, k o e, f. g, j oa, c, d, h, k oe, f. g, h, j

Which best explains why this triangle is or is not a right triangle?

Hi my sisters and brothers can tell me the answer because i don’t understand the question