Cos(2α+β), if cot β=-12/5, cos 2α=1/4, pie<2β<2π, 3π/4 <α< π

How many zeros does the function f(x)=4x3-x2+1 have

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?