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madreJ [45]
3 years ago
15

Brianna's teacher asks her which of these three expressions are equivalent to each other.

Mathematics
2 answers:
jekas [21]3 years ago
7 0
Brianna's thinking is incorrect.
Expessions A, and C. are equivalent.
For C, you add 5x and x together (because they have the same variable) to get 6x - 4.
For A, you subtract 9x and 3x (because they have the same variable) to get 6x- 4.
Otrada [13]3 years ago
3 0

Brianna is correct about the situation when x=0.  But you can't say that
expressions are really equivalent unless they have the same value for <u>
EVERY</u> 'x', no matter what it is.

Expressions <em>'A'</em> and <em>'C'</em> will do that.  But Expression 'B' won't, unless x=0.


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goldenfox [79]

Answer:

Following are the solution to the given points:

Step-by-step explanation:

In point 1:

The Reflexive closure:  

Relationship R reflexive closure becomes achieved with both the addition(a,a) to R Therefore, (a,a) is  (0,0),(1,1),(2,2) \ and \ (3,3)

Thus, the reflexive closure: R={(0,0),(0,1),(1,1),(1,2),(2,0),(2,2),(3,0), (3,3)}

In point 2:

The Symmetric closure:

R relation symmetrically closes by adding(b,a) to R for each (a,b) of R  Therefore, here (b,a) is:   (0,1),(0,2)\ and \ (0,3)

Thus, the Symmetrical closure:

R={(0,1),(0,2),(0,3)(1,0),(1,1)(1,2),(2,0),(2,2),(3,0), (3,3)}

8 0
2 years ago
Calculate the mass of a liquid with a density of .7892 g/mL and a volume of 121.0 mL.
nataly862011 [7]

Answer:

95.49 g

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D = m/v

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Only g and not g/mL because the mL cancels each other out. It's easier to see if you rewrite it on paper.

Round to sig figs

Both original numbers hold 4 sig figs

95.49 g

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