Answer: 15
Step-by-step explanation:To evaluate the expression 5a - 4x - 3y, we substitute the given values for a, x, and y into the expression.
Given:
a = -2
x = -10
y = 5
Substituting these values into the expression, we have:
5(-2) - 4(-10) - 3(5)
Multiplying and simplifying, we get:
-10 + 40 - 15
Combining like terms, we have:
-10 + 40 - 15 = 30 - 15 = 15
Therefore, when a = -2, x = -10, and y = 5, the expression 5a - 4x - 3y evaluates to 15.