Question

Help please!!! :)

What is –5 • 8 • (–7)?
A.–280
B.–240
C.240
D.280

Answer 1

Okay... rule about multiplying integers...
Same sign --> Positive product
Different sign --> Negative product.

Let's look at some simple cases...
(-4) •8 = -32
since the signs are different, on the other hand
(-4)•(-7) = 28
since the signs are the same :)

That said, what's
-5•8
?

Answer 2

you would simple multiply straight across.
-5*8=-40
take -40*-7=280.
two negatives cancel each other out when multiplying :)