The augmented matrix of a system of linear equations is given in reduced row-echelon form. find the solution of the system. (if the system has infinitely many solutions, express your answer in terms of t, where x = x(t), y = y(t), and z = t. if the system is inconsistent, enter inconsistent.)

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?