Find the area of the irregular figure 3 in 3 in 4 in 4 in 6 in 8 in

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.