It's +31.
if there's a minus next to a bracket you have to turn every operator the opposite inside that bracket
-(-31) = +31
Answer:
B
Step-by-step explanation:
-36-8= -36+(-8)
U . v = |u| . |v| cos 60 = 10 * 8 * 0.5 = 40 This is called the scalar (or dot) product.
