Describe how to determine the average rate of change between x = 4 and x = 6 for the function f(x) = 2x + 4. Include the average rate of change in your answer.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

If chord ab is congruent to chord cd, then what must be true about ef and eg?