Instrumental learning
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It is used in autopsy as a method of opening a human corpse without damaging the organs. It is often referred to as step 2 after physical examination of the freshly slain corpse. If you are lucky, you can dig someone up and try this on them :)
If you take a common factor and write it outside of the parentheses (which you may need to add), that's called "factoring" or "factorizing". If you have a common factor in the numerator and denominator of an expression, you can just eliminate both; that's often referred to as "simplifying".
A rectangle is a good, simple shape to begin with. The area of a rectangle is equal to the product of the length of its base and the length of its height. The height is a segment that is perpendicular to the base. For a rectangle, the base and height are often called the "length" and the "width", and sometimes the height is referred to as the "altitude."
An instrument to construct straight lines is called a rule. It's often referred to as a ruler, but a ruler is someone who rules a country. A rule is a piece of wood, metal or plastic (usually showing measurements) that you can use to draw/construct straight lines.A straight edgeThe most common one is a ruler
Algebrais a branch of mathematics that uses mathematical statements to describe relationships between things that vary over time. These variables include things like the relationship between supply of an object and its price. When we use a mathematical statement to describe a relationship, we often use letters to represent the quantity that varies, since it is not a fixed amount. These letters and symbols are referred to as variables.