karatechopper
  • karatechopper
One number is 5 times another number. The product of the two numbers is 245. Find the two numbers. Please explain this to me!!!
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
You're right about the equations 5N = X and NX = 245. What I would do is substitute 5N for X in the second equation since you know one X is worth 5N. So you would get: N(5N) = 245; then distribute to get: 5N ^2 = 245; then divide both sides by 5 to isolate the variable N^2 = 49; then take the square root of both sides N = 7; put that value back into your original equation to get X = 5N = 5(7) = 35 N could also be -7 since both 7 and -7 square to be 49. In this case, X would be -35.
anonymous
  • anonymous
If 5n = x, then put 5n in for x in the other equation 5n^2 = 245 then divide by 5 n^2 = 49 n = 7 5 times n = 35 The 2 numbers are 7 and 35
karatechopper
  • karatechopper
see i did the substitute part then got confused

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anonymous
  • anonymous
At least you tried

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