Two times the sum of a number and 9 equals 7

What is the answer to |-2x-5|-|-4+8| and x=7

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

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.