7b - 9b + 3 + 4b

what is the answer to this problem

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

The variable in a relation who’s value depends on the value of the independent variable is called what?

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.