What is the area of the shaded region?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Acircle has a circumference of 7.850 units. what is its radius?

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