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butalik [34]
3 years ago
9

14. Define a Variable

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
6 0

Answer: In mathematics, a variable is a symbol which functions as a placeholder for varying expression or quantities, and is often used to represent an arbitrary element of a set. In addition to numbers, variables are commonly used to represent vectors, matrices and functions

Step-by-step explanation:A symbol for a value we don't know yet. It is usually a letter like x or y.

Example: in x + 2 = 6, x is the variable.

Why "variable" when it may have just one value? In the case of x + 2 = 6 we can solve it to find that x = 4. But in something like y = x + 2 (a linear equation) x can have many values. In general it is much easier to always call it a variable even though in some cases it is a single value.

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A 2-column table with 5 rows. Column 1 has entries x, x, x, x, Total 100 percent. Column 2 has entries 5 dollars, 5 dollars, 5 d
Tju [1.3M]

Answer:

C

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What is the slope of the line?
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3/1

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2x - 3y = 14<br> 5x - 3y = -10
pshichka [43]

Answer:

x = -8

y = -10

Step-by-step explanation:

Elimination

2x - 3y = 14

5x - 3y = -10

__________--

-3x = 24

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x = -8

Subsitution

2x - 3y = 14

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5 0
4 years ago
Which is the simplified form of the expression (StartFraction (x Superscript negative 3 Baseline) (y squared) Over (x Superscrip
Vlad [161]

Answer:

The simplified form of the expression is \frac{1}{x^{7} y^{4}}.

Step-by-step explanation:

The expression is:

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The division rule of exponents is:

a^{m}\div a^{n}=a^{m-n}

The negative exponent rule is:

a^{-m}=\frac{1}{a^{m}}

Simplify the expression as follows:

\frac{x^{-3}\cdot y^{2}}{x^{4}\cdot y^{6}}=[x^{-3-4}]\times [y^{2-6}]

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Thus, the simplified form of the expression is \frac{1}{x^{7} y^{4}}.

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prohojiy [21]

Answer:

77,000

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If 72,000 is 150% of direct labor, then direct labor is 48,000 (72000/1.5)

direct labor 48000

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total costs:           197,000

less total above:  120,000

=material costs.     77,000

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3 years ago
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