. Prove that |x|+ |x + ;] = |2x| for any real number .

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Q: I need help for number 7. Thanks!

A: (a)Let

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Q: I need help with the last 3 please.

A: Given information µ = 4.7 σ = 0.6 d) z < -1.44 Finding the x at z = -1.44