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11y ago

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What is the two inside quanities of a proportion called?

meansThe two outside one are the extremes.


What is a standard quantity in terms of which other quanities may be expressed?

A standard quantity is a defined measurement or unit that serves as a reference point for expressing other quantities. It provides a consistent basis for comparison and evaluation, ensuring clarity and uniformity in measurement. For example, a meter is a standard quantity for length, allowing various lengths to be expressed in meters. This concept is essential in fields like science, engineering, and commerce, where precise communication of measurements is crucial.


How can I write ratios and unit rates to compare quanities?

To write ratios, express the relationship between two quantities using a colon or fraction format, such as 3:4 or 3/4. To find unit rates, divide one quantity by the other to determine how much of one unit corresponds to a single unit of the other, for example, 60 miles in 2 hours can be expressed as a unit rate of 30 miles per hour. This allows for easy comparison of quantities across different contexts. Always ensure the quantities are in compatible units for accurate comparisons.


What is subtraction of vector quanities?

Vectors are added graphically tip to tail. You subtract vector B from vector A by adding vector -B to vector A. Where -B means a vector that points in the opposite direction as B , but has same magnitude. For example to subtract B (magnitude 4, points left) from vector A (magnitude 3, points up), first draw A, then draw -B (magnitude 4, points right) ,starting -B at the tip of A. Then the vector that connects the tail of A to the tip of -B is the difference A - B or A + (-B) . In this example A & -B form the legs 3 & 4 of a right triangle so the hypotenuse (which is A - B) is 5.