Find the solution of the system of equations.
3x + 9y = -21
3x + 8y=-18

Whats the name of the vertical axis

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.

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form