If \(x\) and \(y\) are positive integers and \(n=5^x+7^{(y+15)},\) what is the units digit of \(n?\)
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If \(x\) and \(y\) are positive integers and \(n=5^x+7^{(y+15)},\) what is the units digit of \(n?\)
(1) \(y=2x-15\)
(2) \(y^2-6y+5=0\)
Answer: B
Source: Manhattan GMAT
(1) \(y=2x-15\)
(2) \(y^2-6y+5=0\)
Answer: B
Source: Manhattan GMAT
