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9-39.

What is the probability that x2 + 7x + k is factorable if 0 ≤ k ≤ 20 and k is an integer? Homework Help ✎

How many possible values are there for k? This is the denominator of the probability.

What numbers between 0 and 20 starting with 1 and going to 20 have two factors that add to 7? Note: 0 works because x would be a factor.