Question

Which is right?????​

Answer 1

C.
`31\left(-10\right)=-310`

Explanation:

`31\left(-10\right)`

`\mathrm{Remove\:parentheses}:\quad \left(-a\right)=-a`

`=-31\cdot \:10`

`\mathrm{Multiply\:the\:numbers:}\:31\cdot \:10=310`

`=-310`

Answer 2

C

Explanation:

When talking about multiplication two negatives do, in fact, make a positive but if there is only one negative in the equation, the product(answer) will be negative. Therefore, C 31(-10)=-310 is the only problem that is correct.