From the question, given:
Let f(x) = -53x + 4
We are asked to evaluate f(-1) without using calculator.
f(x) = -53x + 4
f(-1) = -53(-1) + 4 (replace the value of x with -1)
= 53(1) + 4 (negative signs cancelling out)
= 53 + 4
= 57
Therefore, the answer is 57.
