Show that if D is diagonal with each dii ≥ 0, then f(x) = x^T Dx is convex.

Jamie is hiking up a small mountain. he climbs up at a constant rate of 300 feet/hour until he reaches the peak at 1,500 feet. after that, he hikes down at the same rate to the base of the mountain. the equation that models jamie’s elevation, e, after t hours is e = . jamie’s elevation will be 600 feet after hours and after hours.

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)