Find the equation of the line using exact numbers

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?

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