Two angles are comlementary. the first angle measures x and the second angle measures 3x-10. find x?

Icould really use some with this question.

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

What is the distance between the points (2, 5) and (5,9)?