Usatestprep help please

Which shows a reasonable estimation for 124% of 42 using the distributive property?

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?