Hector spent $41.75 for 2 dvds that cost the same amount. the sales tax on his purchase was $3.15. hector also used a coupon for $1.00 off his purchase.

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?

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.