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DD Which of the following represents the concentration of the base in the new mixture as a function of x, when x mL of pure base is added to 180 mL of a 20% base solution? DD

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DD Solve the equation x  1213 + x + 1413 = 813. DD

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DD Which of the following are the solutions of the equation x  18x = 3. DD

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DD Which of the following are the solutions of the equation x + 13x  14 = 0? DD

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DD Solve the equation x + 12x15x + 345x2 + 3x = 0. DD

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DD Sum of a number and its reciprocal is  2. Find the number. DD

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DD In Smith cookies Co., the fixed cost for making cookies is $2300 per week and it costs $0.17 extra to make one cookie. If the selling price of each cookie is$0.39, then find the minimum number of cookies that will earn the company a profit. DD

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DD Express the function, which is used to minimize the perimeter of a rectangle of area 400 square units in terms of its width x. DD

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DD Which of the following would be the solution of inequality f (x) = (x + 3)(x^{2} + 11)(x  5)^{2} > 0. DD

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DD Choose the values of x for which the polynomial function, f (x) = (x + 4)(x + 13)(x  7)^{2} will be zero. DD

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DD Find the value of x for which the polynomial function f (x) = (3x^{2} + 4)(x  6)^{2}(x + 1)^{3} is negative. DD

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B Choose the values of x for which the polynomial function f (x) = (x + 5)^{3} (2x^{2} + 6)(x  15)^{4} becomes zero. B

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B Which of the following inequalities can be used to calculate the side of an aluminium cube if the cube has a surface area that is greater than 1200 cm^{2}? B

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B Which of the following are the solutions of the equation x  40x = 3. B

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B Which of the following are the solutions of the equation x + 6x  7 = 0? B

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B Which of the following are the solutions of the equation 3xx+5+1x+2 = 7x2+7x+10? B

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B Sum of a number and its reciprocal is 2. Find the number. B

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B In Smith cookies Co., the fixed cost for making cookies is $2600 per week and it costs $0.19 extra to make one cookie. If the selling price of each cookie is$0.35, then find the minimum number of cookies that will earn the company a profit. B

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B Solve the equation x + 4x6x + 212x2 + 2x = 0. B

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B Express the function, which is used to minimize the perimeter of a rectangle of area 200 square units in terms of its width x. B

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B Which of the following would be the solution of inequality f (x) = (x + 2)(x^{2} + 5)(x  4)^{2} > 0. B

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B Choose the interval for x for which the polynomial function f (x) = (x + 2)(x + 3)(x  6) is negative. B

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B Choose the values of x for which the polynomial function, f (x) = (x + 2)(x + 4)(x  4)^{2} will be zero. B

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B Find the value of x for which the polynomial function f (x) = (2x^{2} + 5)(x  9)^{2}(x + 3)^{3} is negative. B

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B Choose the values of x for which the polynomial function f (x) = (x + 2)^{3} (4x^{2} + 5)(x  12)^{4} becomes zero. B

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B Which of the following inequalities can be used to calculate the side of an aluminium cube if the cube has a surface area that is greater than 2400 cm^{2}? B

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