If a single 20 sided dice is tossed once what is the probability of rolling a 15 or 17

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

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.

Find the domain of the following expression: 1/(√x)-2