Answer: -10
Explanation:
First, simplify this expression. Use the distributive property.
-5(3x + 4y)
-15x - 20y
Now, put in the value of each of the given variables. We know that x = 2 and y = -1:
-15(2) - 20(-1)
-30 +20
-10
Therefore, our answer is -10.