ans: 2
2 - (-2) =
ans: 4
20 - (-5) - (-25) =
ans: 8
10% of 10 =
ans: 16
16 minus by itself?
(5x + 2y) x (4x - 5y)
(20x2 - 25xy + 8xy - 10y2)
=20x2 - 17xy -10y2
Problem:
A man has to be at work by 9:00 a.m. and it takes him 15 minutes to get dressed, 20 minutes to eat and 35 minutes to walk to work. What time should he get up?
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