One and two thirds times a right angle

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.