Answer
4 and 5
Explanation
A constant term in an expression is a term that does is independent of any variables. This means that constant term will have non of the variables 
attached to them. In the expression 
we notice that the terms integers 4 and 5 are the only terms that are not coefficients of any of the variables in the expression.
They were beiing mean people.
Goods originated from Mali: gold, ivory, copper;
Goods that Mali obtained through trade: salt, horses;
The Mali Empire was the largest and most powerful African Empire. It was relatively well developed, used its numerous natural resources to get wealth, and was heavily involved in trade. Some of the natural resources of Mali were the gold, copper, and ivory, and this empire used them to get enormous amounts of wealth, as these things were highly demanded and appreciated.
The wealth that Mali was getting, was later used for obtaining things through trade that the empire lacked, like the salt and the the horses. The salt was very popular for the cooking, while the horses were in high demand for transport and warfare.
Ed Gein
On July 26, 1984, Ed Gein, a serial killer infamous for skinning human corpses, dies of complications from cancer in a Wisconsin prison at age 77.
