book Maths Puzzle Numerical Ability

.....^
..../a
.../....
../......
./........
/bcd>

ignore the dots, they are filler to line everything up.
a) 5x-20
b) 2x+8
c) blank
d) 6x+

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book Other Question

-3(b-8)-5=9(b+2)+1 Bobby and Rick are in a 10-lap race on a one-mile track. Bobby, averaging 90mph, has completed two laps just as Rick is getting his car onto the track. What speed does Rick have to average to be even with Bobby at the end of the tenth lap?