The sum of the first n term of an AP is n^2 - 3n.
Write down the 10 term?

p

step-by-step explanation:

12 dolars one is cheaper becasue 3 pairs is 6 means is sock is 2 while the 12 is cheaper

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the figure is a concave pentagon.

step-by-step explanation:

in mathematical context, a pentagon is a flat, two-dimensional closed shape (polygon) with 5 straight sides and 5 angles.

now a pentagon is said to be concave if one or more corners bend inwards and at least one of its angles is 180 degrees or more than 180 degrees.

in the given figure, we can see that we have a corner which is bending inwards and an angle which is clearly greater than 180°. therefore, it is a concave pentagon.