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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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What can you simplify 12+3(18-42)+9
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Answer:

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Step-by-step explanation:

<u>Step 1:  Solve inside the parenthesis</u>

12 + 3(18 - 42) + 9

<em>12 + 3(-24) + 9</em>

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<u>Step 2:  Multiply</u>

12 + 3(-24) + 9

<em>12 - 72 + 9</em>

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<u>Step 3:  Combine the first two numbers</u>

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<u>Step 4:  Combine the last two numbers</u>

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