Final answer:
Without the specific algebraic expression to evaluate, it is impossible to determine which of the given options (a. -1 b. -7/20 c. 11/20 d. 1/4) is the correct answer. The values to be substituted are b = -3/4 and x = 2/5, and the process involves replacing the variables in the expression with these values and simplifying.
Step-by-step explanation:
The original question seems to be missing, but based on the information provided and the options given (a. -1 b. -7/20 c. 11/20 d. 1/4), it appears that you need to evaluate an algebraic expression with two variables, where b = -3/4 and x = 2/5. Without the specific expression, I cannot provide the exact answer. However, I can guide you on how to substitute these values into an expression. For example, if the expression is bx + c, where c is some constant, you would replace b with -3/4 and x with 2/5, and then simplify the result. Remember to apply the order of operations: parentheses, exponents, multiplication and division (from left to right), addition and subtraction (from left to right).