Ill give brainliest
please help with these formulas!! (show work)

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

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8