How many degrees are there in a right angle

Alonso walked with his friend andy one day, and wanted to compare their speeds. alonso walked 3 miles in one hour, and andy walked 2 miles in 2 hours. complete the table to graph the relationship for each person.

Which of the following is true for the relation f(x)=2x^2+1

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?