Find all functions $f:\mathbb R \to \mathbb R$ that satisfy$$ f(x) + 3 f\left( \frac {x-1}{x} \right) = 7x $$for all nonzero $x$. Note that the domain of $f$ is all real numbers. Make sure you define your function everywhere!

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?

Luigi is the first person to finish a 5k race and is standing 13 feet beyond the finish line. another runner, mario, is still running the race and has approximately 24 feet before he reaches the finish line. what is the distance between mario and luigi? explain through words, numbers or pictures how you found the answer.