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Find and simplify the difference of the golden ratio and its multiplicative inverse

Ajar contains a mixture of 20 black marbles, 16 red marbles, and 4 white marbles, all the same size. find the probability of drawing a white or red marble on the first draw. 125 12 01 next question ask for turn it in

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28