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

What is the value of x? enter your answer in the box. (cm)

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?