I need help with this

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

The angles in a triangle are represented by 5x, 8x, and 2x+9. what is the value of ? a.10.8 b.11.4 c.9.7 d.7.2