2nd Secundaria Math Problems

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Questions and Answers

What is the sum of the interior angles of a triangle?

  • 270°
  • 360°
  • 180° (correct)
  • 540°

If a bakery sells 250 loaves of bread per day, how many loaves will it sell in 5 days?

  • 1000 loaves
  • 2500 loaves
  • 1250 loaves (correct)
  • 500 loaves

What is the value of x in the equation 2x + 5 = 11?

  • 2
  • 3 (correct)
  • 5
  • 4

If a book costs $15, and a 10% discount is applied, how much will the book cost after the discount?

<p>$13.50 (D)</p> Signup and view all the answers

What is the perimeter of a rectangle with a length of 6 cm and a width of 4 cm?

<p>16 cm (D)</p> Signup and view all the answers

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Study Notes

Geometry

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

Real-World Applications

  • If a bakery sells 250 loaves of bread per day, it will sell 250 x 5 = 1250 loaves in 5 days.

Algebra

  • To solve the equation 2x + 5 = 11, subtract 5 from both sides to get 2x = 6, then divide both sides by 2 to get x = 3.

Discounts

  • If a book costs $15, and a 10% discount is applied, the discount is $15 x 0.10 = $1.50, so the book will cost $15 - $1.50 = $13.50 after the discount.

Geometry

  • The perimeter of a rectangle with a length of 6 cm and a width of 4 cm is 2(l + w) = 2(6 + 4) = 2 x 10 = 20 cm.

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