Final answer:
The function R(x) = 5x, when evaluated at x=-2, yields R(-2) = 5*(-2) = -10, which corresponds to answer choice A. -10.
Step-by-step explanation:
The question involves evaluating a value using a provided mathematical function. Given the function R(x) = 5x, to find the value of R(-2), we substitute -2 for x in the equation. By multiplying 5 by -2, we obtain the result -10.
Therefore, when we use the function R(x) to find R(-2), the answer is A. -10.
To find 1-2) Rx) = 5x, we substitute 5 for x in the function Rx = 5x. So, Rx = 5(5) = 25. Therefore, the answer is C. 25.