Parallel lines will never touch each other while perpendicular forms like an X shape. The slope for the parallel is the same while the perpendicular is a negative reciprocal. (Ex for negative reciprocal. 2/4=4/2)
Answer:
x = 0
Step-by-step explanation:
Multiply the first equation by -3 and add the second equation.
-3(-x +2y) +(6y) = -3(6) +(x +18)
3x -6y +6y = -18 +x +18 . . . . eliminate parentheses
3x = x . . . . . . . . .simplify
2x = 0 . . . . . . . . subtract x
x = 0 . . . . . . . . . .divide by 2
Answer:
x = 15
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Sum the 3 given angles and equate to 180
8x - 7 + x + 7 + 2x + 15 = 180 , that is
11x + 15 = 180 ( subtract 15 from both sides )
11x = 165 ( divide both sides by 11 )
x = 15
