Solve
x2−7x+9=0
Leave your answers in surd form and simplify fully.

In the rectangle below ac=30 units what is de

Find the domain of the following expression: 1/(√x)-2

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