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2.Given the scheme R= (ABCDEF), and following set of functional dependencies: F = (AB®C, C®A, BC®D, ACD®B, D®EF, BE®C, CF®BD, CE ...

, ACD®B, D®EF, BE®C, CF®BD, CE ®AF). (a) Find (BD)+ (b) Find (AB)+ (c) Find Candidate Keys for R Question 3 Given the scheme R= (ABC), and following set of functional dependencies: F = (A®BC, B® AC, C ® AB). (a) Find closure (BC, F) (b) Find at least one candidate key for R. (c) Find at least one super-key for R which is not the same as your answer in (b). (d) Find at least one minimal cover for a relational scheme (ABC). Show work. (e) Provide a 3NF decomposition for R. Question 4 Consider the following set of FDs: F = (A ® B, AB ® C, D ® AC, D ® E) G = (A ® BC, D ® AE) H = (A ® BC, B ® C, A ® B, AB ® C, AC ® D). (a) Is F ≡ G? Show your work. (b) Find the minimal cover for H. Show work.
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3.Let’s assume that you have a company that buys goods from a local factory and you resell them online. You buy ...

ne. You buy product A for $16 and sell it for $19. Each unit of product B brings you $12 of profit and each unit of product C costs $31. You lost your inventory books but you have the following information about the last month: Your total profit was $17,334 The total number of products B and C you sold were 1,269 The only delivery of product C you received was for $15,531 You fulfilled an order for one product A and one product C and you charged the customer $56. Find the number of sold items and the profit for each product.
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4.Let’s assume that you have a company that buys goods from a local factory and you resell them online. You buy ...

ne. You buy product A for $16 and sell it for $19. Each unit of product B brings you $12 of profit and each unit of product C costs $31. You lost your inventory books but you have the following information about the last month: Your total profit was $17,334 The total number of products B and C you sold were 1,269 The only delivery of product C you received was for $15,531 You fulfilled an order for one product A and one product C and you charged the customer $56. Find the number of sold items and the profit for each product.
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5.1. In Z10, find a != 0 and b != 1 such that ab = a. 2. Prove: if a, ...

en a |(26+c). 3. Prove: if a = b (mod n) and k | n, then a = b (mod k). 4. Determine, with justification, whether Q[x]/(x2 – 9) is an integral domain. 5. Factor x4 + x2 + 1 as a product of monic irreducible polynomials in Z3 [2]. 6. Determine, with justification, whether 10 is a unit in Z18.
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6.Hi there, I've been struggling with the problem for quite a while and i have not been able to find ...

formula online to help.. It should be a simple straightforward problem but i just can not for the life of me figure it out. are you able to provide me with a formula or point me in the right direction? The problem is: Solution A has a 50% concentration Solution B has a 100% concentration Solution C has a 5% concentration you have 5L of each solution to utilize as well as unlimited quantities of water to dilute solution concentrations if needed. Part A Make a final solution of 100ml with solution concentrations of Solution A 15%, solution C 5% and solution C 80%. how much of each solution will you need to make your final 100ml solution? Part B using the above solutions how many 100ml final solutions can you produce with the 5L volumes? No matter how I work it i can't make the solution to the correct concentrations. Thank you for your help. John
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7.Hi there, I've been struggling with the problem for quite a while and i have not been able to find ...

formula online to help.. It should be a simple straightforward problem but i just can not for the life of me figure it out. are you able to provide me with a formula or point me in the right direction? The problem is: Solution A has a 50% concentration Solution B has a 100% concentration Solution C has a 5% concentration you have 5L of each solution to utilize as well as unlimited quantities of water to dilute solution concentrations if needed. Part A Make a final solution of 100ml with solution concentrations of Solution A 15%, solution C 5% and solution C 80%. how much of each solution will you need to make your final 100ml solution? Part B using the above solutions how many 100ml final solutions can you produce with the 5L volumes? No matter how I work it i can't make the solution to the correct concentrations. Thank you for your help. John
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8.(1,5) , (2,10) and (3, 19) are points on the curve y = ax^2 + bx + c. Found a, ...

-1 and c = 4. So quadratic function is y = 2x^2 - x + 4. Next question is: suppose that the 3rd point is written as (3, t). Find all values for t that will change the quadratic function y =ax^2 + bx + c into a linear function.
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics