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the answer is Whether the sample was selected from the population by a random method

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15y ago

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What is a mathematical factor?

A number that goes in a number.(e.g 3 is a factor of 9)


The problem solving method in chemistry that uses mathematical relationships to convert one quantity to another?

Factor Label Method


What goes into 7 and 21?

The number 7 and 21 have a common factor of 7. This means that 7 is a divisor of both 7 and 21. In mathematical terms, 7 is a factor of both numbers, as it divides each of them without leaving a remainder.


How do you factorise 7a2 -8ab?

To factorize the expression 7a^2 - 8ab, you need to find the greatest common factor of the two terms. In this case, the common factor is a. So, you can factor out an 'a' to get a(7a - 8b) as the factored form of the expression. This means that 7a^2 - 8ab can be simplified as a multiplied by the quantity (7a - 8b).


What the negative and positive sign shows for power factor?

Applying a negative or positive sign to power factor is an obsolete method of describing whether it is 'leading' or 'lagging'. We no longer do this. These days, a 'leading power factor' indicates that the load is capacitive and the load current is leading the supply voltage, and a 'lagging power factor' indicates that the load is inductive, and the load current is lagging the supply voltage. Having said that, a 'negative' power factor is also the mathematical consequence of 'negative power' -i.e. the direction of power when it is fed from the load back to the supply (e.g. when the grid feeds energy into a generator, causing it to 'motor'). In this case, the power factor isn't really negative, but simply appears to be so.

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