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The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas 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

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?