how do you use the pythagorean theorem to tell if the values : 8,20, 15 are an acute, obtuse, or right triangle?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20