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Lauren goes to a store and buys an item that costs 
x dollars. She has a coupon for 
5% off, and then a 
9% tax is added to the discounted price. Write an expression in terms of 
x that represents the total amount that Lauren paid at the register.
Answer:

Lauren goes to a store and buys an item that costs x x dollars. She has a coupon for 5% 5 \% off, and then a 9% 9 \% tax is added to the discounted price. Write an expression in terms of x x that represents the total amount that Lauren paid at the register.\newlineAnswer:

Full solution

Q. Lauren goes to a store and buys an item that costs x x dollars. She has a coupon for 5% 5 \% off, and then a 9% 9 \% tax is added to the discounted price. Write an expression in terms of x x that represents the total amount that Lauren paid at the register.\newlineAnswer:
  1. Calculate Discount Amount: Calculate the amount of discount Lauren gets with her coupon.\newlineThe discount is 5%5\% of xx, so the discount amount is 0.05×x0.05 \times x.
  2. Find Discounted Price: Subtract the discount from the original price to find the discounted price.\newlineThe discounted price is x0.05×xx - 0.05 \times x.
  3. Simplify Discounted Price: Simplify the expression for the discounted price.\newlineThe discounted price simplifies to 0.95×x0.95 \times x (since x0.05×x=1x0.05x=0.95xx - 0.05 \times x = 1x - 0.05x = 0.95x).
  4. Calculate Sales Tax: Calculate the sales tax on the discounted price.\newlineThe sales tax is 9%9\% of the discounted price, so the tax amount is 0.09×(0.95×x)0.09 \times (0.95 \times x).
  5. Find Total Amount Paid: Add the sales tax to the discounted price to find the total amount paid.\newlineThe total amount paid is 0.95×x+0.09×(0.95×x)0.95 \times x + 0.09 \times (0.95 \times x).
  6. Simplify Total Amount Paid: Simplify the expression for the total amount paid. The total amount paid simplifies to 0.95×x+0.0855×x0.95 \times x + 0.0855 \times x (since 0.09×0.95=0.08550.09 \times 0.95 = 0.0855).
  7. Combine Like Terms: Combine like terms to get the final expression.\newlineThe final expression for the total amount paid is (0.95+0.0855)×x(0.95 + 0.0855) \times x, which simplifies to 1.0355×x1.0355 \times x.

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