Given f(x)=5x+2 and g(x)=x^2+1 what is g(f(x))

For the equations below which statement is true ? -2x=14 6x=-42

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

Hurry if the population of of an ant hill doubles every 10 days and there are currently 100 ants living in the ant hill what will the ant population be in 20 days