anonymous
  • anonymous
How do I figure out what the two wole numbers whose product is 1224 and whose sum is 70 is?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
simultaneous equations
anonymous
  • anonymous
??
watchmath
  • watchmath
36 and 34 I guess :)

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anonymous
  • anonymous
Think of all the numbers that add up to 70, then multiply the pairs untill you find one that = 1224 .
anonymous
  • anonymous
Thank you. I can figure it out that way but wasn't sure if there was a alegbra fomula for this?
watchmath
  • watchmath
Use intellegent guess. 40 times 30 is 1200. So the two numbers roughly between 30 and 40. To make the sum 70 and the last digit equal 4, we need the two end digits to be 4 and 6. Hence the best bet is 34,36. Checking the product of the two confirm our guess.
watchmath
  • watchmath
If you want to solve this algebraically: \(x+y=70\) \(xy=1224\) \(x(70-x)=1224\) \(-x^2+70x-1224=0\) Use quadratic formula to solve it for x.

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