Find the mean of the following 2x-5y,5x+2y,8x+6y,x-y​

4x + 0.5y

Step-by-step explanation:

Concept:

Here, we need to understand the idea of the mean (average).

The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.

If you are still confused, please refer to the attachment below for a graphical explanation.

Solve:

**Disclaimer** I assume the question is asking for the arithmetic mean instead of geometric. If it was, then you can refer to my answers. If it was not, then you can point it out and I will redo the question.

Terms: 2x-5y, 5x+2y, 8x+6y, x-y

Number of terms: 4

 [(2x-5y) + (5x+2y) + (8x+6y) + (x-y)] / 4

=[2x + 5x + 8x + x + 2y - 5y + 6y - y] / 4

=[16x + 2y] / 4

=4x + 0.5y

Hope this helps!! :)

Please let me know if you have any questions

The half life of the medication, in hours is 2.3 hours

Solution:

Half life of medications means the time in which the medication become half of its original value i.e. From 10 milligrams to 5 milligrams

The time in which medication become 6.5 milligram  is 3 hours

To become 1 milligram the time taken will be 3 divided by 6.5

So, the half life time [5 milligram] will be, time taken for 1 milligram multiplied by 5

Thus it takes 2.3 hours for half life of medication