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Mathematics, 24.08.2019 01:30 taryn3

Arectangular game board is composed of identical squares arranged in a rectangular array of r rows and r+1 columns. the r rows are numbered from 1 through r, and the r+1 columns are numbered from 1 through r+1. if r> 10, which of the following represents the number of squares on the board that are neither in the 4th row nor in the 7th column?
a. r^2 - r
b. r^2 - 1
c. r^2
d. r^2 + 1
e. r^2 + r

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