The relationship between what Alex typed and what Tasha typed can be represented by a simple equation.
Where: 'A' the number of words Alex typed in a minute and T is the number of words typed by Tasha in a minute.
[tex]A = (1.23)T \\ 54 = (1.23)T \\ \frac{54}{1.23} = T \\ T = 43.9 [/tex]
Therefore Tasha typed 43.9 words in one minute.
Hope this helps!