Loryn Essay

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Unit 1 Practice Exam 1. Simplify 23. a. 23 b. 6 c. 8 d. 12 2. The area of a circle is approximately 3.14 times the radius squared. Which of the following expressions is a correct way to write this, if the radius is r? a. r(3.14)2 b. 3.14r2 c. (3.14r)2 d. 2(3.14)r 3. Merrill bought m notebooks for $2.50 each and n pens for $1.25 each. Which expression best shows how much she spent? a. 2.50 + m + 1.25 + n b. Mn + (2.50)(1.25) c. 3.75(m + n) d. 2.50m + 1.25n 4. Evaluate n4 if n = 3. a. 81 b. 12 c. 7 5. Evaluate 3x – 2 if x = 5. a. 9 b. 13 c. 123 6. Simplify [pic] a. 3 b. .6 c. 17.4 7. Translate into symbols: the product of 19 and n. a. 19n b. 19 + n c. 19 – n d. 19/n 8. Translate into symbols: 5 plus the quantity of 6 minus m. a. (5 + 6) – m b. 5 + 6 – m c. 5 + (6 – m) 9. Translate into symbols: The difference of 5 squared and a. a. 52 + a b. 52 – a c. 52/a 10. A farmer has a rectangular field which measures 100 feet for the length and w feet for the width. If the perimeter is the sum of all four sides of the field, what is an expression for the perimeter of the field? Simplify. a. 100w b. 200 + 2w c. 200 + w2 11. Match each with the expression or equation which best describes it. Potential Matches: 1: a + b = b + a 2: (a + b) + c = a + (b + c) 3: a(b + c) = ab + ac 4: This expression has 4 of them: 3a + b – 5 + 8d. 5: This is what the 5 in the term 5xy is called. Answers: ___: Term ___: Coefficient ___: Associative Property ___: Distributive

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