book Maths Puzzle Numerical Ability

The hiking club hiked to Robbers Cave State Park ar 4 mph. They got a ride back to town in a truck that went 20 mph. If the round trip took 18 hours, how far was it from town to the park?

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book Other Question
This proble involves a function rule..
Input X 1 2 3 4 5 6
Output Y 3 2 1 0 -1 -2
We need to determine the function rule.

Another one..
Input X 1 2 3 4 5 6
Input y 1 3 5 7 9 11

Thanks! prob. 74_

solve and graph the solution for the inqualities.

7(x-3) >5x -14
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