Iam not sure if my answer is correct and i am not really risking to get it wrong but i am not sure i need a little

You are correct. If two expressions are equivalent, no matter which values you plug for the variables, the results will always be the same.

Two equivalent expression represent the same computation, so if you do the same computation with the same inputs, you'll get the same output.

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

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

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