Can anyone help please? Just a quick answer or explain it.

Acontractor needs 54 square feet of brick to construct a rectangular walkway. the length of the walkway is 15 feet more than the width. write an equation that could be used to determine the dimensions of the walkway. solve this equation to find the length and width, in feet, of the walkway.

Find the solution on the interval [0, 2pi)

What is the explicit formula for this sequence -7, -4, -1, 2, 5