7th Grade Math Unit 2 Test

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Questions and Answers

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?

  • 3.00
  • 4.20
  • 3.14 (correct)
  • 2.71

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

  • Ï€ (pi) is approximately equal to 3.14.

Geometry

  • The sum of interior angles of a triangle is 180 degrees.

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