How to solve 12^r=13 in solving exponential equation with logarithms

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.