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Questions and Answers
In the equation 2x + 5 = 15, what is the value of x?
In the equation 2x + 5 = 15, what is the value of x?
- 10 (correct)
- 15
- 20
- 5
What is the value of π (pi) approximately equal to?
What is the value of π (pi) approximately equal to?
- 3.00
- 4.20
- 3.14 (correct)
- 2.71
What is the sum of interior angles of a triangle?
What is the sum of interior angles of a triangle?
- 360 degrees
- 270 degrees
- 180 degrees (correct)
- 90 degrees
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Study Notes
Solving for x
- To solve for x in the equation 2x + 5 = 15, subtract 5 from both sides, resulting in 2x = 10, then divide both sides by 2, yielding x = 5.
Mathematical Constants
- π (pi) is approximately equal to 3.14.
Geometry
- The sum of interior angles of a triangle is 180 degrees.
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