The rate of something is usually a measurement in change of something 'over' something else. Here the word 'over' means 'divided by'. For example your velocity is a rate. When you are driving, your car covers a certain distance 'over' a certain span of time. Thus the rate here we call velocity. Distance/Time = Avg Velocity
The value of the letter Z in the equation 8 Z times 64 is 8. This is a math problem.
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It is not a even a valid equation since "rate" is not a well-defined term. Rate is simply the average change in something per unit of time. If properly defined, it is an equivalence relationship.
Rate of change = amount of change in some period of time/amount of time for the change
Equations are something you do to make something equal something else to find the missing variables. Algebra is the operations that you perform to find those missing variables.
You multiply the tax with the price then divide
To find the average speed or rate of something.(: