Respuesta :
We have a negative number multiplied by a positive number, so our answer is going to be negative.
One way to think about this is in terms of debt. If I owe you money for 3 movie tickets worth $10, we can express this numerically as
3 x (-10)
where the negative sign indicates debt. If I owe you 3 debts, that's naturally going to come out to another debt. In this case
3 x (-10) = -30
which means I owe you $30.