Final answer:
When y = -2 and z = -5, the expression 10y^2/z evaluates to -8.
Step-by-step explanation:
To evaluate the expression 10y^2/z when y = -2 and z = -5, we substitute the given values into the expression.
First, we substitute y = -2:
10(-2)^2/z
Next, we substitute z = -5:
10(-2)^2/(-5)
Simplifying the expression, we calculate:
10(4)/(-5) = -40/5 = -8
Therefore, when y = -2 and z = -5, the expression 10y^2/z evaluates to -8.