A supply chain analyst is determining the acceptable tolerance range for shipping delays, represented by $z$, using the inequality $-15 < \frac{3}{5}z$. To solve for $z$, the analyst multiplies both sides by the reciprocal, $\frac{5}{3}$. Recalling the properties of inequalities, why does the direction of the inequality symbol remain unchanged (resulting in $-25 < z$) during this calculation?

An operations manager at a distribution center uses the inequality $-15 < \frac{3}{5}z$ to determine the safe load adjustment $z$ (in tons) for a storage rack. Match each term of the solution process with its correct mathematical value or notation based on the steps for solving and graphing the result.

A facility manager is using the inequality $-15 < \frac{3}{5}z$ to determine the minimum safety tolerance $z$ for a ventilation system. Arrange the following steps in the correct chronological order to solve the inequality and represent the solution graphically and in interval notation, according to the standard procedure.

A logistics coordinator determines that a safety threshold $z$ must satisfy the inequality ${}-15 < \frac{3}{5}z$. True or False: To correctly graph the solution set on a number line, a left parenthesis should be placed at ${}-25$ and the line should be shaded to the right.

A logistics manager determines that a safety threshold $z$ must satisfy the inequality ${}-15 < \frac{3}{5}z$. To solve for $z$, the manager multiplies both sides by $\frac{5}{3}$, resulting in the boundary value for the solution set. When representing this solution in interval notation as documented in the procedure, the interval is written as (____, $\infty$).