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Mamont248 [21]
2 years ago
9

Is this an inequality or equation?

Mathematics
2 answers:
Deffense [45]2 years ago
5 0

Answer:

its an inequality

Step-by-step explanation:

20<u>>(</u>8x1)+(x0.8)

an enequality will always have >,<,<u><,></u>

an equation will have =

romanna [79]2 years ago
3 0

Answer:

Equation

Step-by-step explanation:

A statement that the values of two mathematical expressions are equal (indicated by the sign =).

^^ This is the definition of equation

Difference in size, degree, circumstances, etc.; lack of equality.

^^ This is the definition for Inequality

The question moves more toward equation than inequality.

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ICE Princess25 [194]

Multiply both sides of the second equation by 100 to get rid of the decimals:

0.05<em>n</em> + 0.10<em>d</em> = 1.50

==>  5<em>n</em> + 10<em>d</em> = 150

Multiply both sides of the first equation by -5:

<em>n</em> + <em>d</em> = 21

==>  -5<em>n</em> - 5<em>d</em> = -105

Add the two equations together:

(5<em>n</em> + 10<em>d</em>) + (-5<em>n</em> - 5<em>d</em>) = 150 + (-105)

Notice that the terms containing <em>n</em> get eliminated and we can solve for <em>d</em> :

(5<em>n</em> - 5<em>n</em>) + (10<em>d</em> - 5<em>d</em>) = 150 - 105

5<em>d</em> = 45

<em>d</em> = 45/5 = 9

Plug this into either original equation to solve for <em>n</em>. Doing this with the first equation is easiest:

<em>n</em> + 9 = 21

<em>n</em> = 21 - 9 = 12

So Donna used 12 nickels and 9 dimes.

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Step-by-step explanation:

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Probability = 12/52 = 3/13

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100% right answer

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