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CRCT Warm-ups Week of January 24 th, 2011

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MONDAY 17. When graphed, which situation's data would be linear? A. The temperature of the roof of a house every hour for 24 hours. B. A person's body temperature every hour for a year. C. The temperature of water rising 3°F every hour. D. The daily temperature of a city for a year. 18. The length of a square's diagonal is (15) cm. Which letter on the number line represent the square root of this value? A. A B. B C. C D. D

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TUESDAY 19. Why is one of the square roots of any positive number less than zero? A. because a negative number times a negative number is a positive number B. because a negative number times a negative number is a negative number C. because a negative number times a positive number is a negative number D. because a negative number times a positive number is a positive number 20. Jordan drove a^3 miles per hour for a^5 hours. How far did Jordan drive? A. a^2 miles B. a^8 miles C. a^12 miles D. a^15 miles

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THURSDAY 21. Alyssa estimated that there are five hundred twenty billion grains of sand on a beach. How is this number written in scientific notation? A. 5.2 × 10^9 B. 5.2 × 10^10 C. 5.2 × 10^11 D. 5.2 × 10^ Trevor wants to buy one magazine and some books. The magazine costs $3. The books cost $5 each. If Trevor spends y amount of dollars, which equation shows how many books (x) he can buy? A. y = x + 2 B. y = x + 8 C. y = 3x + 5 D. y = 5x + 3

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FRIDAY 23. Sophia has 8 books in her locker. All the books are either school books or personal books. She has three times as many school books than personal books. How many school books does Sophia have in her locker? A. 2 B. 3 C. 6 D. 7

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24. Jenny wanted to know if people were more likely to beep their horns at a certain time during the day. One night she recorded the number of times she heard a car horn during one hour intervals. What should be the value of the missing y-coordinate so that the data can be modeled with a linear function? A. 24 B. 25 C. 26 D. 27

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