4x - 8 = 3x + 12
x - 8 = 12
x= 20
He bought 12 cans of soda you get that by multiplying 12 by 0.90 if you divide 4.50 by 5 you get 0,90 that is you multiply 12 by 0.90 and you get 10.80 <span />
Arrays are useful models for multiplication which can be used in a variety of ways, ranging from highly structured lessons to games and open investigations. An array is formed by arranging a set of objects into rows and columns. Each column must contain the same number of objects as the other columns, and each row must have the same number as the other rows.
The following array, consisting of four columns and three rows, could be used to represent the number sentence 3 x 4 = 12.
Find the number of full ones by subtracting empty from total:
50 - 23 = 27 full
The ratio of empty to full is written as empty: full
Ratio = 23:27
Refer to attachment for your answer
