exam Maths Puzzle Numerical Ability

Could you please check this one?

-1/20(5Z-4W)-6(-1/30-6/24Z) I get 2/5W..is this correct??
Thanks!

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exam Other Question

Help please, I just can not figure out what do do here. This is number 2 I need help with and grealy apprieciate all help. It says to graph the inequality on a plane. Thank you. Gr On a 130 mile trip, a car traveled at an average speed of 55 mph and then reduced its speed to 40 mph for the remainder of the trip. The trip took a total of 2.5 hours. For how long did the car travel at 40 mph?