book Maths Puzzle Numerical Ability

mr. west drove his car from home to chicago at the rate of 40 mph. amd returned at a rate of 45mph. if his time going exceed his time returning by 30 minutes, find his time going and his time returning

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My question says to solve each system of inequalities by graphing. I'm not sure of how to do this...Could you help me? One of my many problems on this subject is....
y<x+1
y>-x+5 i have another question, and this is how to find the points so that i can graph y=2x-1 this is totally different from the one i just sent to you, and i dont get how to solve th