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Maths Puzzle
Numerical Ability
John and Harvey sold widgets, Harvey sold 2 1/2 times as many widgets as John. If the difference in their sales was 87 units. How many widgets did each of them sell?
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book Other Question
If the voltage V is an electric circuit is held constant, the current I is inversely proportional to the resistance R. If the current is 40 amperes when the resistance is 270 ohms, find the current when the resistance is 150 ohms.
Rewrite the rational expression as an equivalent rational expression with the given denominator.
x+1
--------- = ------------
2
15x + 119x + 98 x(15x+14)(x