Question

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 discount rate (in decimal form).
R=1- S/L

The list price of the shirt is $30. What is the discount rate?

Answer 1

Answer:

Discount rate of the item will be $r=1-\frac{S}{30}$.

Step-by-step explanation:

The given formula is S = L - rL

Here S = sale price of an item

r = Discount rate

L = List price of the item

S - L = - rL

L - S = rL

$r=\frac{1}{L}(L-S)$

$r=1-\frac{S}{L}$

Now we have to calculate the discount price of the shirt when it's list price is $30.

By replacing L = 30 in the given formula

$r=1-\frac{S}{30}$

Discount rate of the item will be $r=1-\frac{S}{30}$.

Answer 2

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 discount rate.

Since, S = L -rL

rL = L -S

r = $\frac{L-S}{L}$

r = $1-\frac{S}{L}$

Since, the listed price of the shirt is $30, we have to find the discount rate.

Therefore, r = $1-\frac{S}{30}$ is the discount rate.