Darren runs 1/4 mile in 2.5 minutes. how long it will take him to run a full mile

What is the value of x in the diagram below?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.