Posted by jalen on Sunday, December 13, 2009 at 9:15pm.
the sum of two decimal numbers is 5.3. their difference is 1.7 and there product is 6.3 what are the two numbers?

math  DrBob222, Sunday, December 13, 2009 at 9:22pm
x = one number
y = other number.
===============
x+y=5.3
xy=1.7
Solve for x and y.
You don't need the other information but it can be used if you wish.

math  Reiny, Sunday, December 13, 2009 at 9:24pm
x+y = 5.3
xy = 1.7
add them
2x = 7.0
x = 3.5
then y = 1.8
the info that their product is 6.3 was redundant, but checked out.

math  Rudy, Sunday, December 13, 2009 at 9:25pm
1.8 and 3.5. I just used guess and check. I knew that the numbers had to be under 5.3. Also, the number in the tenths place had to add up to 13 or 3, so 1.8 and 3.5.
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