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Find the value of the expression \newline9.9z9.9 - z\newlinefor z=7z = 7.

Full solution

Q. Find the value of the expression \newline9.9z9.9 - z\newlinefor z=7z = 7.
  1. Plug in z value: Plug in the value of zz into the expression 9.9z9.9 - z.\newlineCalculation: 9.979.9 - 7
  2. Simplify expression: Simplify the expression by subtracting 77 from 9.99.9.\newlineCalculation: 9.97=2.99.9 - 7 = 2.9

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