Final answer:
To evaluate the expression 5c × d with c = 1/5 and d = 15, substitute in the given values to calculate 5 × (1/5) × 15, which simplifies to 15.
Step-by-step explanation:
To evaluate 5c \times d when c = \frac{1}{5} and d = 15, we simply substitute the values of c and d into the expression.
So, we have:
5 \times \frac{1}{5} \times 15 = 1 \times 15 = 15.
Therefore, the value of the expression is 15.