Answer for question 3 A and B please. Please explain answers! 32 points

Timed*** there are 8 rows and 8 columns, or 64 squares on a chessboard. suppose you place 1 penny on row 1 column a, 2 pennies on row 1 column b, 4 pennies on row 1 column c, and so on … how many pennies are on each square? a =   b =   c = d =   e =   f = g =   h =

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

When you answer this can you explain