Amy does a weekly exercise program consisting of cardiovascular work and weight training. Each week, she exercises for at least 9 hours. She spends at most 12 hours on weight training. She spends at most 7 hours doing cardiovascular work. Let x denote the time (in hours) that amy spends doing cardiovascular work. Let y denote the time (in hours) that she spends weight training.

I'm terrible at math any here is appreciated.

An airplane consumes fuel at a constant rate while flying through clear skies, and it consumes fuel at a rate of 64 gallons per minute while flying through rain clouds. let c represent the number of minutes the plane can fly through clear skies and r represent the number of minutes the plane can fly through rain clouds without consuming all of its fuel. 56c+64r < 900056c+64r< 9000 according to the inequality, at what rate does the airplane consume fuel while flying through clear skies, and how much fuel does it have before takeoff? the airplane consumes fuel at a rate of gallons per minute while flying through clear skies, and it has gallons of fuel before takeoff. does the airplane have enough fuel to fly for 60 minutes through clear skies and 90 minutes through rain clouds?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then