Answer:
False
Step-by-step explanation:
2x+7=30
2x=23
X= 23/2 or 11.5
X does not equal 3, therefore the statement is false
That would be a variable, x being one of the most commonly used variables to represent unknown numbers.
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Answer:
D
Step-by-step explanation:
Answer:
<em>4</em><em>0</em><em>cm</em><em>.</em>
Step-by-step explanation:
<em>4</em><em>0</em><em>cm</em><em> </em><em>is</em><em> </em><em>t</em><em>he</em><em> </em><em>answer </em><em>.</em>