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Question

Prove or disprove the following inference rules for a relation r(R) with W,X,Y, and Z subsets of attributes of R. a. X→Y and Z→W imply XZ→YW. b. XY→Z and Z→X imply Z→Y. c. X→Y and Y→Z imply X→YZ. Options:

asked Oct 17, 2024

1 answer 47.4k views

Consider two ways to algebraically solve the system of equations representing this situation. Complete the statements describing how to solve the system by reducing it to a two-variable system with r and

answered Jul 26, 2024

1 answer 165k views

Task 2 Print Evaluating Secondary Sources: Writing an Opinion Piece Historians still don't agree on the exact cause of the Salem witch trials. Several theories have been put forward explaining the motive

asked Jun 22, 2024

1 answer 169k views

In a pt with a low probabilty of PE based on the Wells criteria, what lab study is most helpful in ruling OUT a PE

asked Jun 16, 2024

1 answer 33.5k views

Is it possible for the function f(x)= 5x2^x to have an output of 200 ? If so, what input gives this output? If not, justify why not.

answered Jun 8, 2024

1 answer 35.8k views

How has abraham lincolm learn from his mistakes

asked May 8, 2024

1 answer 193k views

Please help and explain PLEASE HELP PLEASE :( Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help Please help

answered Apr 16, 2024

2 answers 132k views

The time-dependent biological process that involves functional loss and susceptibility to disease and death is called ______?

answered Apr 2, 2024

1 answer 89.8k views

What are several lifestyle differences to take into consideration when working with clients?

asked Mar 7, 2024

1 answer 220k views

At the end of the year, overhead applied was 3,737,000. Actual overhead was3,379,000. Closing over/underapplied overhead into cost of goods sold would cause net income to ________? 1) increase 2) decrease

asked Mar 6, 2024

1 answer 21.3k views

Romantic love is closely associated with marriage in society True/ false

answered Mar 6, 2024

1 answer 133k views

Why did Roosevelt support Britain in ww2?

asked Feb 28, 2024

1 answer 230k views

Damage of full thickness burns-what level of skin

asked Feb 14, 2024

1 answer 39.8k views

What to know before watching ant man and the wasp quantumania

asked Feb 10, 2024

1 answer 59.1k views

Read the excerpt from William Shakespeare’s Hamlet. To be, or not to be, that is the question: Whether ’tis nobler in the mind to suffer The slings and arrows of outrageous fortune, Or to take arms against

asked Oct 7, 2023

1 answer 71.8k views

The scatterplot below shows the ages of some children in the amount of time each been playing outside last week. Which equation could represent the line of best fit for the number of hours a child spends

asked Aug 9, 2023

1 answer 130k views

NEED HELP ASAP!!!! Which equations define y as a linear function of x ? Select all that apply. A y=2x B y=5x3+3 C y=12x−9 D y=x2 E y=4x2+2x F y=2(4x−2)+16

asked Jul 28, 2023

1 answer 166k views

How many solutions does the system of equations below have? y = 6x − 7 y = 5 3 x + 1 3

asked Jun 6, 2023

1 answer 164k views

Joeff charges 20$ flat rate plus 27$ per hour to work on cars. how many dollars does joeff earn for a 5 hour job?

asked May 5, 2023

1 answer 119k views

Mark is studying the life cycle of monarch butterflies. He needs to know all of the content in order to do well on the test. What is the meaning of content in this sentence?

answered May 1, 2023

1 answer 213k views

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