What is an equation of the line that is perpendicular to 5x-4y=10 that passes through the point (-1,-6)

Based on the spreadsheet below, which of the following is a true statement?

Renee hiked for 6 3/4 miles. after resting, renee hiked back along the same route for 5 1/4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.

Which of the following are identities? check all that apply. a. cos(x + y) + cos(x - y) = 2009 xcosy o b. cos(x + y) - cos(x - y) = 2 coexcosy c. sin(x + y) + sin(x - y) = 2cosxsiny d. tar(x - 25) = tan x