quiz 1A sol

# quiz 1A sol - a FALSE ∣− 5 ∣= 5 Recall the definition...

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Name SOLUTION KEY Quiz 1A Date____/____/____ MAC 1140 Fall 07 Complete all questions 1.)MATCHING. Match the number from the list with the simplest set that describes the number given. (Use each set only ONCE.) A 4 a.) D 5.1 b.) C 2 c.) B − 9 3 d.) 2.)FILL IN THE BLANK. The variables a ,b and c are real numbers. a.) a b c = ab ac is the called the Distributive property. b.) ab = ba is the called the Commutative property. 3.)TRUE OR FALSE. Circle one or the other.
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Unformatted text preview: a.) FALSE: ∣− 5 ∣= 5 ( Recall the definition of absolute value.) b.) FALSE: ∣ x y ∣≥∣ x ∣∣ y ∣ for all real x and y (Just try x= -1 and y=1) 4.)If x = 2 and y =− 1 then evaluate the expression: ∣ 2 −∣ x − y ∣− x ∣ x − y − 1 . After substitution we have: ∣ 2 −∣ 2 −− 1 ∣− 2 ∣ 2 −− 1 − 1 = ∣ −∣ 3 ∣∣ 2 −− 2 = 3 4...
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