exam Maths Puzzle Numerical Ability

A person is biking and rode 30 miles in 2 hours with the wind and rode 12 miles in 3 hours against the wind. What is the rate of the wind speed? How would I set up the problem with 2 variables?

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exam Other Question
what is the slope of the line connecting the two points (-7,5) and (2,-3) The length of a rectangular garden is 6 ft less than 4 times its width. If the perimeter of the garden is 38 ft, find the dimensions of the garden.