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a_sh-v [17]
3 years ago
8

Steve uses 14 blue beads and 6 green beads to make a bracelet. Which ratio compares the number of blue beads to the total number

s of beads in one bracelet?
A. 14:6
B. 6:14
C. 6:20
D. 14:20
Mathematics
1 answer:
sladkih [1.3K]3 years ago
3 0

There are 14 blue beads in total. If you use 14 blue needs and 6 green needs that is 14+ 6 which equals 20.

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e) Given the following: Let X = {1, 2, 3, 4) and a relation R on X as R= {(1,2), (2,3), (3,4)}. Find the reflexive and transitiv
Naddika [18.5K]

Answer:

The answer is \{(1,1),(2,2),(3,3),(4,4),(1,2)(2,3)(3,4),(1,3),(1,4)\}

Step-by-step explanation:

Remember that a reflexive relation R\subset \mathcal{P}(X), where \mathcal{P}(X) is the power set of X, is one which conteins the ordered pairs of the form (a,a), for a\in X.

So, As the reflexive and transitive closure of R (that we will denote by \overline{R}) is in particular reflexive, we must add to R  the elements \{(1,1) , (2,2),(3,3),(4,4) \}

A transitive relation R is one in which if the pair (a,b) and the pair (b,c) are in there, then the pair (a,c) must be there too.

So, to complete the relation R to be reflexive and transitive we must add the pair (1,3) (because (1,2),(2,3) are in R), the pair (2,4), and the pair (1,4) because we added the pair (2,4).

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6 0
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