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

Which function has the same domain as y=2x

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f