Let m and j be two nxn matrices such that
jmj-1=
0 1 0 0
0 0 2 0
0 0 0 1
4 0 0 0
compute the determinant of m.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling