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What are the two numbers that when multiplied equals 85.9375 and when added equals 20 showing your workings?

Updated: 4/28/2022

Wiki User

∙ 12y ago

Best Answer

105.9375

Virginia Bradtke ∙

Lvl 10

∙ 3y ago

This answer is:

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Wiki User

∙ 12y ago

Let the numbers be x and y:

x+y = 20 which implies that: y = 20-x

xy = 85.9375 which implies that: x(20-x) = 85.9375 => 20x-x2 = 85.9375

Divide all terms by -1 and form a quadratic equation:

x2-20x+85.9375 = 0

Solving the above equation by means of the quadratic equation formula gives x values of 6.25 or 13.75

Therefore it follows that the numbers are 6.25 and 13.75

Check: 6.25*13.75 = 85.9375 and 6.25+13.75 = 20

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What is the greatest common divisor and least common multiple of 1375 6875 and 78125?

1375=5*5*5*116875=5*5*5*5*1178125=5*5*5*5*5*5*5gcd=5*5*5=1251375=5*5*5*116875=5*5*5*5*1178125=5*5*5*5*5*5*5lcm=5*5*5*5*5*5*5*11=859375

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What is the greatest common divisor and least common multiple of 1375 6875 and 78125?

1375=5*5*5*116875=5*5*5*5*1178125=5*5*5*5*5*5*5gcd=5*5*5=1251375=5*5*5*116875=5*5*5*5*1178125=5*5*5*5*5*5*5lcm=5*5*5*5*5*5*5*11=859375

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