The row-echelon form of the augmented matrix of a system of equations is given. find the solution of the system.
1 0 0 0 9/4
0 1 0 0 3/5
0 0 1 0 2/3
0 0 0 1 -9/5

41/2 - 1 1/3 what is the answer as a fraction?

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.