Please help thank you

The sum of two numbers is 86, and their difference is 20. find the two numbers

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.