# A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have an average of 84?

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A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have an average of 84?

78, 90, 79, 88.

A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have an average of 84?

78, 90, 79, 88.

85

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This equation makes sense because we are essentially finding the average of the test scores. Let's simplify this further to get

This is what the final test grade has to be. Let's find the averages now to ensure that this number makes sense:

Hope this helps!

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It seems like some crucial details, such as the number of tests already taken and the grades received on those tests, are missing from your question. Could you provide those details?

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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