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1.1 Variables in Algebra Ex. 2) Average speed is given by the following formula Average speed = Distance = d Time t Find the average speed in mph of a car that traveled 180 miles from Monmouth Junction, NJ to the Albany, NY in 3 hours.

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Ex. 3) Find the perimeter of the triangle. The dimensions are in feet. a = 17 b b = 8 a c = 15 c

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Ex. 4) The simple interest earned by money P at an annual interest rate r for t years is given by Prt. You deposit $650 at a rate of 8% per year. How much simple interest will you earn after one half of a year?

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© Nuffield Foundation 2011 Free-Standing Mathematics Activity Speed and distance.

© Nuffield Foundation 2011 Free-Standing Mathematics Activity Speed and distance.

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