Increasing the price of an item decreases the amount of people willing to buy it, identify the independent and dependent variables

What is the greatest common factor of 6a, 8a^{2}, and 14?

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?

Sum is 17 and their difference is 3