Posted by fred on Tuesday, September 4, 2012 at 4:10pm.
Mr burr the head custodian is working on putting new numbers on 42 of the 81 classroom doors. He found two numbers for the 23rd door he was working on in the 6th grade hallway whose sum is 35 and their product is 306. What are the two numbers?

math  Henry, Wednesday, September 5, 2012 at 9:09pm
Eq1: X+Y = 35.
Eq2: XY.
X + Y = 35
Y = 35X
In Eq2, replace Y with 35X
X(35X) = 306
X^2 + 35x = 306
X^2 + 35x  306 = 0.
X^2 _ 35 + 306 = 0
(x17)(x18) = 0.
X = 17, and 18.

math  Henry, Wednesday, September 5, 2012 at 9:14pm
Correction:
Eq2: XY = 306.
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