39.
0.3x + 0.4y = 2.5 અને 0.5X – 0.3y = 0.3 નો ઉકેલ આદેશની રીતે મેળવો.

Will give a: 122 b: 90 c: 48 d: 180

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?

How many zeroes do we write when we write all the integers 1 to 243 in base 3?