Mathematics & Science

The sum of the interior angles of any triangle in Euclidean geometry is always 180 degrees, which is a fundamental property of three-sided polygons. Option D is incorrect because 360 degrees is the sum of the interior angles of a quadrilateral, or the sum of the exterior angles of any polygon.

Solving the linear equation 2x + 7 = 19 involves subtracting 7 from both sides to get 2x = 12, and then dividing by 2 to find that x equals 6. Distractors like 5 are incorrect because substituting them into the equation does not satisfy the equality, yielding 17 instead of 19.

Solving the linear equation 2x + 7 = 19 involves subtracting 7 from both sides to get 2x = 12, and then dividing by 2 to find that x equals 6. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.

• !Distractors like 5 are incorrect because substituting them into the equation does not satisfy the equality, yielding 17 instead of 19.
• !An option like 40 is incorrect because 40 squared is only 1600, while 44 squared is 1936, making 42 the only mathematically correct choice.
• !Option A is incorrect because it describes cellular respiration, which is the reverse reaction where glucose is broken down to release energy.
• !Option A (So) is incorrect as it is a common distractor that does not exist on the periodic table, while S represents sulfur and Sn represents tin.
• !Option D is incorrect because 360 degrees is the sum of the interior angles of a quadrilateral, or the sum of the exterior angles of any polygon.

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