need asap 40 points and brainliest

a)x-axis, y=x, y-axis, x-axis
b)y-axis, x-axis, y-axis, x-axis
c)y=x, x-axis, x-axis
d) x-axis, y-axis, x-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.

What is the value of x when x + 7 = 21?

∆red ≅ ∆ by rule will give brainiest if possible