book Maths Puzzle Numerical Ability

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

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book Other Question

-2x^2+7x-10<=(-3)x+2

Possible answers

a. (-inf,-3) U (-2,+inf)
b. (-inf,2) U (3, inf)
c. (-3,-2)
d. (2,3)
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