If a laptop originally costs $800 at purchase, and is then discounted by
10%, the remainder would be $720, given that 10% of $800 is $80.
Therefore, once then applying the credit card to reduce it another $150,
the final price of the laptop would come out to $570 once the
deductions are considered.
In case you're not already aware, the expression is called the "difference quotient" and represents the average rate of change of a function over an interval .
Hello! When finding the perimeter of a rectangle, you have to consider the properties of a rectangle. A rectangle has two pairs of equal sides where one is the width, while the other one is the length. Now looking back at your question, it says "... a rectangle that is x units wide" ⇒ you let the width = x ; this is the same with "y units long" ⇒ length = y. Perimeter can just be : P = 24. Therefore, The equation would be: x + x + y + y = P. 2x + 2y = P. (Sub in P = 24) ∴ 2x + 2y = 24. (This should be your answer.) :) Good luck (Message me if you have any problem)