Explain how to get answer i'm confused !

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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.