College algebra

Question

A sheet of steel is to be 0.35 inch tick, with a tolerance of 0.015 inch. Express this specification with an inequality containing an absolute value. (Use x as the variable)

Answer 1

Let x be the value of the thickness of the sheet. The difference between the real sheet thickness and the specification sheet thickness must be less than 0.015. Thus the equation is l x - 0.035 l < 0.015