Let Q be the set of rational numbers, so any element in Q can be written as the form of x y , here x is an integer, and y is a nonzero integer. Let Z be the set of integers. Define the mapping f : Q → Z by f( x y ) = x − y for any x y ∈ Q. Here x is any integer and y is any nonzero integer

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step-by-step explanation:

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

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step-by-step explanation:

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option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: