The sale price S (in dollars) of an item is given by the formula S=L−rL, where L is the list price (in dollars) and r is the dis

Answer:

The item's discount rate is .

Detailed explanation:

The formula provided is S = L - rL.

Here, S stands for the sale price,

r is the discount rate,

and L is the list price.

By rearranging, we get:

S - L = -rL

L - S = rL

which can be written as

To find the discount rate for a shirt listed at $30, substitute L = 30 into the equation:

The resulting discount rate is .

The sale price S (in dollars) of an item is calculated using the formula

S = L - rL, where L represents the list price (dollars) and r denotes the discount rate.

Rearranged, this becomes:

rL = L - S

and thus

r =

which simplifies to

r =

Given the shirt's list price is $30, we will compute the discount rate accordingly.

Hence, the discount rate r equals .