Is (7,4), (5,-1), (3,-8), (1,-5), and (3,6) a function ?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

What is best way to getting answer for my exam is

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.