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Three coins are flipped. what is the probability that there will be at least two tails?

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

What is the standard form of -5x^2+2x^4-11+x^3+3x