Which of the following is always the center of the circle inscribed in a triangle?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

The area of the map is the product of the length and width. write and expression for the area as the product of the two binomials do not multiply