Determine which of the lines, if any, are parallel or perpendicular. Explain. 9. The lines pass through the following points:
Line a: (1, 5) and (-2, -4)
Line b: (3, 2) and (1, -4)
Line c: (6, 1) and (-4, 2)

10.
Line a: 4y - 12x = 20
Line b: 3y = -x + 2
Line c: y = 3x - 1

Every rhombus is a square. true false

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?