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LUCKY_DIMON [66]
3 years ago
8

Which expression is equivalent for this

Mathematics
1 answer:
True [87]3 years ago
7 0

Answer: Option A

Step-by-step explanation:

Remember that

+ * - = -\\- * + = -\\+ * + = +\\- * - = +\\

We have the expression

\frac{1}{2}x + (-7)-2*\frac{1}{4}-(-2)

Solve first the multiplication of signs

\frac{1}{2}x + (-7)-2\frac{1}{4}x-(-2)\\\\\frac{1}{2}x -7-2\frac{1}{4}x+2\ \ \ \ \ \ \ \ Note:\ 2\frac{1}{4}=2+\frac{1}{4}=\frac{9}{4}\\\\\frac{1}{2}x -\frac{9}{4}x-7+2\ \ \ \ \ \ \ \ Note:\ \frac{1}{2}-\frac{9}{4}=-\frac{7}{4}=-1\frac{3}{4}\\\\-1\frac{3}{4}x -5

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Answer:

Option A, C and D are correct choices.

Step-by-step explanation:

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To find the number of of tickets that Tomas has left we will subtract cost of x rides from total number of tickets that Thomas bought.

We can represent this information in an expression as: 80-5x

Now let us see which of our given choices in equivalent to our expression.

A. 80-5x

Upon looking at option A we can see that it is same as our expression, therefore, option A is the correct choice.

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We can see that in this expression cost of x rides in being added instead of subtraction, therefore, option B is not a correct choice.

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80-5x

Now this expression is same same as our expression, therefore, option C is the correct choice.

D. -5x+80

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A system of equations is given below:
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Solving by substitution:

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