The answer is -224. Here is my work:
- Subsitute the "x" value with 4: f(4) = 2(4) over 2-30
- Multiply: f(4) = 8 over 2-30
- Multiply 2-30 by 8 to remove the fraction: 8(2-30) = -224
- Thus: f(4) = -224
Hope this helped :))