If g(x)=k•f(x), what is the value of k?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?