Mathematics California Mathematics Concepts, Skills and by Roger; Frey, Patricia; Howard, Arthur C.; Hutchens,

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By Roger; Frey, Patricia; Howard, Arthur C.; Hutchens, Deborah A.; Luchin, Beatrice; McClain, Kay; Molix-Bailey, Rhonda J.; Ott, Jack M.; Pelfrey, Ronald; Price, Jack; Vielhaber, Kathleen; Willard, Teri; Zike, Dinah Day

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Extra resources for Mathematics California Mathematics Concepts, Skills and Problem Solving 5 Macmillan

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75 17. 11. The average annual cost of food for a dog is about 35 dollars. What is this cost? (Lesson 1-2) Describe how to use the order of operations to solve numerical expressions that contain more than one operation. (Lesson 1-3) Formative Assessment 31 1-4 Problem-Solving Investigation MAIN IDEA I will use the four-step plan to solve a problem. 1 Analyze problems by identifying relationships, distinguishing relevant from irrelevant information, sequencing and prioritizing information, and observing patterns.

B - a 22. c - b 23. 5c + 6 24. 2b + 7 25. 3a - 4 26. 4b - 10 27. Distance traveled can be found using the expression rt, where r represents the speed (rate) and t represents time. How far did a hot air balloon travel at an average rate of 15 miles per hour for 6 hours? 28. To find the average speed (rate) of a racecar, use the expression d ÷ t, where d represents distance and t represents time. Find the speed s of a racecar that travels 508 miles in 4 hours. 29. The expression 500t can be used to find the distance in miles traveled by a DC–10 aircraft.

2 Use a letter to represent an unknown number; write and evaluate simple algebraic expressions in one variable by substitution. New Vocabulary algebra Algebra: Variables and Expressions A box contains some crayons. There are also two crayons outside of the box. The total number of crayons is the sum of two and some number. The two crayons represent the known value 2, and the crayons in the box represent the unknown value. Algebra is a language of symbols. One symbol that is often used is a variable.

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