Need with 15, 16, 17 and 18. provide an explanation. also list in least to greatest. you in advance!

What is the sum of these mixed numbers 2 1/8 + 4 3/8

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.

What are the domain and range of the function f(x)=2^x+1