Give proofs using contrapositive of the following statements.
1. For integers xy, if x+y is even, then x and y are both odd or b...
60/x + 180/(x-8)
60/x + 180/x-8
range of -[(-x^2-6x-5)^1/2]
6280divided by 9
work out this question +7+3-14= in a numberline
(x+7)(x-9)+(x-7)(x-9)+76= 0
subtract 6 from 82
1+1=11
what does / mean
