Choose the statement that is true and has a converse that is also true. O A. If the equation of a line is y = 3x + 2, then the slope of the line is 3.
O B. If x2 = 100, then x = 10.
O c. If x – 1= 8, then x = 9.
O D. If an angle measures 45 degrees, then the angle is acute.

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