6) Evaluate each algebraic expression, given that x= -1, y=3, z=2, a =1/2, b= -2/3. b) b) c) 7) Determine the degree of each of the following polynomials. b) b) c) 8) Remove the symbols of grouping and simplify the resulting expressions by combining like terms. d) (x + 3y – z) – (2y – x +3z) + (4z – 3x +2y) e) f) 3 – {2x – [1 –(x +y)] + [x – 2y]} 9) Add the algebraic expressions in each of the following groups. c) d) 10) Subtract the algebraic expressions in each of the following groups. c) d)
11) Evaluate each algebraic expression, given that x= -1, y=3, z=2, a =1/2, b= -2/3. c) b) c) 12) Determine the degree of each of the following polynomials. c) b) c) 13) Remove the symbols of grouping and simplify the resulting expressions by combining like terms. g) (x + 3y – z) – (2y – x +3z) + (4z – 3x +2y) h) i) 3 – {2x – [1 –(x +y)] + [x – 2y]} 14) Add the algebraic expressions in each of the following groups. e) f) 15) Subtract the algebraic expressions in each of the following groups. e) f)