Does anyone know #15. Please help and show work I need to pass this

What is the solution of log2  (3x  -  7)  =  3? 4 5

Which statement justifies why angle ebc measures 90?

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