What is the answer to each problem? Please hurry :) I will give Brainlest to whoever answers correctly, thank you.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.