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# Algebra 1

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### Algebra 1

1. 1. Algebra Gr. 6 #1
2. 2. Which expression represents the number of stamps Sarah has left? <ul><li>Sarah collects stamps and keeps them in envelopes. She had 9 envelopes with a certain number of stamps, s, in each envelope. She sells 3 of the envelopes. </li></ul><ul><li>A. 9s - 3 </li></ul><ul><li>B. (9 + 3) s </li></ul><ul><li>C. 9s - 3s </li></ul><ul><li>D. 9s - s - 3 </li></ul>
3. 3. Answer: <ul><li>C. 9s - 3s </li></ul>
4. 4. What is the area of the wall that Keesha will paint? <ul><li>2. Keesha will paint one rectangular wall of her bedroom. The wall measures 10 feet by 8 feet. </li></ul><ul><li>A = l x w </li></ul><ul><li>A. 18 square feet </li></ul><ul><li>B. 64 square feet </li></ul><ul><li>C. 80 square feet </li></ul><ul><li>D. 100 square feet </li></ul>
5. 5. Answer: <ul><li>C. 80 square feet </li></ul>
6. 6. What number should replace n? <ul><li>If 47 - n = 29, what number should replace n to make the sentence true? </li></ul><ul><li>A. 12 </li></ul><ul><li>B. 18 </li></ul><ul><li>C. 21 </li></ul><ul><li>D. 22 </li></ul>
7. 7. Answer: <ul><li>B. 18 </li></ul>
8. 8. Write an expression for the number of hummingbirds Lewis saw on Saturday. <ul><li>On Friday, Lewis saw a certain number of hummingbirds, h . On Saturday, he saw 3 more than twice the number of hummingbirds he saw on Friday. Write your answer. </li></ul>
9. 9. Answer: <ul><li>3 + 2h </li></ul>
10. 10. Explain the difference between an expression and an equation? <ul><li>Answer: </li></ul><ul><li>Equation has an equal sign. </li></ul>