Suppose aunt millie gave you $100 when you were born and then increased each successive birthday present by $10. how much money will you receive on your 21st birthday ?

F(x)= 1/x-4, g(x)=4x+1/x a. use composition to prove whether or not the functions are inverses of each other. b. express the domain of the compositions using interval notation.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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.