book Maths Puzzle Numerical Ability

wind speed of a tropical storm are at least 40mi/h but no more than 74 mi/h.
define a variable and write a compound inequality?

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book Other Question

two angles are supplementary and congruent. how many degrees are in the measure of each angle? The Pythagoean theorem is so complicated! How do you solve a=5,b=12, and c=?