To determine which expressions have a negative sum, let's calculate the sum for each option:
A. \( 7 + (-6) = 7 - 6 = 1 \) (not negative)
B. \( -4 + 3 = -1 \) (negative)
C. \( 7 + (-3) = 7 - 3 = 4 \) (not negative)
D. \( -4 + 5 = 1 \) (not negative)
The only expression that has a negative sum is:
B. -4 + 3