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Find the vertex of the quadratic function f(x)=−4x^2+14x+6 Vertex (give as coordinate pair) rewrite in standard (vertex) form? The exact value of sin(cos^-1(3/5)) ?? please help? Given a 12-question true-false quiz, what is the probability of answering exactly 5 of the questions correctly by guessing? Does the sum of (-1)^(n+1)*e^(-n)*n^3 approaching infinity converge or diverge? How do I enable? or re-enable?