Multiplying 8 by 7 gives 56. This basic arithmetic fact is essential for problem solving and builds a foundation for more complex calculations.

A water molecule is composed of two hydrogen atoms and one oxygen atom. Understanding this basic chemical composition is fundamental in the study of science.

The sentence 'She doesn't like apples.' uses the correct contraction for 'does not'. Proper grammar is essential for clear communication.

Freedom of speech is recognized as a basic civil liberty in many democratic societies. It allows individuals to express their ideas openly and is a cornerstone of democratic values.

Water boils at 100°C at standard atmospheric pressure. This concept is fundamental in both physics and chemistry when studying phase changes.

Subtracting 3 from both sides yields 2x = 8. Dividing both sides by 2 results in x = 4, which is the correct solution.

The sum of the interior angles of any triangle is always 180°. This is a fundamental property in Euclidean geometry.

The area of a rectangle is determined by multiplying its length by its width. In this case, 10 x 5 equals 50, which is the correct answer.

Photosynthesis is the process by which plants convert sunlight into chemical energy using chlorophyll. This process is vital for plant growth and the production of oxygen.

Newton's First Law, also known as the law of inertia, explains that objects remain in their state of motion unless acted upon by an external force. This principle is fundamental to understanding classical mechanics.

The phrase attributes the human action of whispering to the wind, which is a clear example of personification. This literary device is commonly used to give non-human elements human-like qualities.

The invasion of Poland in 1939 is widely accepted as the event that triggered World War II. This marked a significant turning point in world history and led to widespread conflict.

Cells are the fundamental units of life. All living organisms are composed of one or more cells, which perform the essential functions needed for life.

Pi (π) is the ratio of a circle's circumference to its diameter. A common approximation of pi used in calculations is 3.14.

Prioritizing questions you're confident about helps secure marks quickly and efficiently manages exam time. This approach allows for a strategic allocation of time during a test.

Substituting x = 2 into the function, we calculate f(2) = 2*(2²) + 3*2 - 5 = 8 + 6 - 5, which equals 9. This reinforces understanding of function evaluation.

Using the Pythagorean theorem, the hypotenuse of the triangle is 5. The cosine of the angle opposite the side of length 3 is the ratio of the adjacent side (4) to the hypotenuse (5), which is 4/5.

An exothermic reaction is one that releases energy, typically as heat, into its surroundings. This concept is fundamental in understanding energy exchange in chemical reactions.

A mean that is significantly higher than the median usually indicates a right-skewed distribution, where a long tail extends to the right. Recognizing distribution skewness is important in statistical analysis.

Breaking a complex problem into smaller parts allows for a systematic approach to problem solving. This strategy enhances focus on individual components, increasing the likelihood of finding the correct solution.