MAT-121_assignment_sheet_WA1 - Name College ID Thomas...

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Name: College ID: Thomas Edison State College College Algebra (MAT-121) Section no.: Semester and year: Written Assignment 1 Answer all assigned exercises, and show all work. 1. Let set A = 12 5 1 6, , , 3, 0, ,1, 2 , 3, 12 4 8 4 . List all the elements of A that belong to the set of rational numbers. (See section R.2, Example 1.) [2 points] -6, -12/4, -5/8, 0, 1, 3 2. Evaluate each expression. (See section R.2, Example 3.) [4 points] 2. 9 3 16 4 27- 4=23 3. 4 ) 2 )( 3 ( ) 5 ( 6 -30 - (-48) = 18 3. Evaluate each expression for p = –4, q = 8, and r = –10. (See section R2, Example 4.) [4 points] 4. r q r 2 3 3(-10) / 8 - (2 /-10) -3.75 - (-.2) =-3.55
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5. 2 2 5 4 q p r q 8/4 - (-10)/5 2 - (-2) 4 -4/2 + 8/2 -2+4 2 4 / 2 = 2 Answer= 2 4. Use the distributive property to rewrite the sum as a product. (See section R.2, Example 6.) [2 points] x x 10 15 15x – 10x = (15 – 10) =5x(3-2) x = 5x 5. Let x = –4 and y = 2. Evaluate each expression. (See section R.2, Example 9.) [4 points] 6. x y 5 |-5y + -4 | |-10+-4 | |-14 | 14 7. x y x 2 |-4| + |2| / -|-4| |4| + 4 / -4| |8/-4| -2
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6. Simplify the expression. Assume variables represent nonzero real numbers. (See section R.3, Examples 1–3.) [2 points] 3 4 0 2 y x -(2^3 x^0*3 y^12) -8y^12 7. Identify the expression as a polynomial or not a polynomial . If a polynomial, give the degree and identify it as a monomial, binomial, trinomial, or none of these. (See section R.3, Example 4.) [2 points] 5 4 y Polynomial Monomial The degree is 5 8. Find the sum or difference. (See section R.3, Example 5.) [2 points] 1 3 4 2 3 8 2 2 3 3 x x x x x x
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