**100 POINTS WORTH** A jar contains n nickels and d dimes. There are 28 coins in the jar, and the total value of the coins is $2.10. How many nickels and how many dimes are in the jar?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

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?

Find the area of a parallelogram with base 15 yards and height 21 2/3