Digits, Grade 7, Volume 1, Homework Helper

### 9-2: TEKS Practice

• 1.

• a. Find the sales tax to complete the table.

• b. Find the total cost of the item.

• 2. Find the commission to complete the table.

• 3. Last month, a salesperson at a car dealership sold \$205,000 worth of cars. The commission rate is 5%. How much did the salesperson earn last month in commission?

• 4. A salesperson at a jewelry store earns 3% commission each week. Last week, Heidi sold \$720 worth of jewelry.

• a. How much did she make in commission?

• b. How much did the jewelry store make from her sales?

• 5. A salesperson works 40 hours per week at a job where he has two options for being paid. Option A is an hourly wage of \$19. Option B is a commission rate of 8% on weekly sales. How much does he need to sell this week to earn the same amount with the two options?

• 6. The sales tax rate in a city is 9%.

• a. Find the sales tax charged on a purchase of \$600.

• b. Then find the total cost.

• 7. Mental Math A typical tip in a restaurant is 15% of the total bill. If the bill is \$140, what would the typical tip be?

• 8. Reasoning A salesperson's commission rate is 4%.

• a. What is the commission from the sale of \$33,000 worth of furnaces?

• b. Suppose sales would double. What would be true about the commission? Explain without using any calculations.

• 9. The Stock Market Nadia is a stockbroker. She earns 4% commission each week. Last week, she sold \$7,200 worth of stocks.

• a. How much did she make last week in commission?

• b. If she averages that same amount each week, how much did she make in commission in 2011?

• 10. Error Analysis Andrew and Cori start a new sales job. They have two options for being paid. Option A is an hourly wage of \$7.50, working 40 hours a week. Option B is a commission of 6% on the weekly sales, estimating \$3,600 in sales per week for an entry-level salesman. Andrew says he'll take the commission, thinking he'll make \$2,160.

• a. What was Andrew's likely error in computing the commission rate?

• A. He incorrectly converted the percent to a decimal.

• B. He used the equation, commission rate = commission · sales amount.

• C. He used the equation, sales amount = commission rate · commission.

• D. He used the equation, commission equals . fraction commission . , rate , over sales , , amount end fraction

• b. Which option gives Cori more earnings per week?

• A. Option A

• B. Option B

• C. Both options generate the same amount of earnings.

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