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If f(x)=5x-3, what is the value of f(4) ?

If f(x)=5x−3 f(x)=5 x-3 , what is the value of f(4) f(4) ?

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Full solution

Q. If f(x)=5x−3 f(x)=5 x-3 , what is the value of f(4) f(4) ?
  1. Substitute xx with 44: To find the value of f(4)f(4), we need to substitute xx with 44 in the function f(x)=5x−3f(x) = 5x - 3.\newlineCalculation: f(4)=5(4)−3f(4) = 5(4) - 3
  2. Multiply 55 by 44: Now, we multiply 55 by 44 to get 2020.\newlineCalculation: 5×4=205 \times 4 = 20
  3. Subtract 33 from 2020: Next, we subtract 33 from 2020 to find the value of f(4)f(4).\newlineCalculation: 20−3=1720 - 3 = 17

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