9x+8
9x+8
81 8+1=9 9*9=81
8 times 9 = 72
8 times 9= 72
8 * 9 = 72.
if you add the digits of the number such as 81 8+1=9 every time, the digits of the number will add up to 9
First add 8 and 9 to get 17. Then divide 340 by 17 to get 20. Then times 20 by 8 to find the number of girls or times 20 by 9 to get the number of boys. Number of girls: 160 Number of boys: 180
80 ÷ 9 = 8 remainder 8
It is: (9-4-2) times 8 = 24
8 x 9 = 72
6 goes in 12 times. 8 goes in 9 times. 9 goes in 8 times.
A standard chessboard has 8 rows and 8 columns. The total number of rectangles that can be formed is calculated using the formula ( \frac{n(n+1)}{2} ) for both rows and columns, where ( n ) is the number of rows or columns. Therefore, the number of rectangles is ( \frac{8 \times 9}{2} \times \frac{8 \times 9}{2} = 1296 ). Thus, there are 1,296 rectangles on a chessboard.