A function `f` is defined by `f(x) = 2x-5`. Write down the values of(i) `f(0)`, (ii) `f(7)`, (iii) `f(3)`.

Explanation

To solve the problem step by step, we will evaluate the function \( f(x) = 2x - 5 \) for the specified values of \( x \).

### Step 1: Calculate \( f(0) \)
To find \( f(0) \), we substitute \( x = 0 \) into the function:
\[ f(0) = 2(0) - 5 \]
Calculating this gives:
\[ f(0) = 0 - 5 = -5 \]

### Step 2: Calculate \( f(7) \)
Next, we calculate \( f(7) \) by substituting \( x = 7 \) into the function:
\[ f(7) = 2(7) - 5 \]
Calculating this gives:
\[ f(7) = 14 - 5 = 9 \]

### Step 3: Calculate \( f(3) \)
Finally, we calculate \( f(3) \) by substituting \( x = 3 \) into the function:
\[ f(3) = 2(3) - 5 \]
Calculating this gives:
\[ f(3) = 6 - 5 = 1 \]

### Summary of Results
- \( f(0) = -5 \)
- \( f(7) = 9 \)
- \( f(3) = 1 \)