Tom and Jim each have some books after Jim borrowed 20% of Tom’s box the number of books jim owned was increased by 15% to 23, how many books did tom have at first?

Can someone pls ! pls answer all. no explanation needed..

Find the zeros of each function. f(x) = x^2 + 5x - 6

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?