Ihave been on this problem for about half an hour. 0.4(8-0.2w)=-4 w=?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Write 5 in the form of a/b using integers to show it as a rational number