Which of the relations given by the following sets of ordered pairs is a function? {(5,4), (5,6), (5,8), (5,10), (5,12)}
{(5,2), (-4,2), (3,6), (0,4), (-1,2)}
{(-3,-2), (-2,-1), (0,-1), (0,1), (1,2)}
{(7,3), (-6,8), (-3,5), (0,-3), (7,11)}

In the diagram below what is the approximate length of the minor arc ab

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?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?