At the city museum, child admission is $6.20 and adult admission is $9.80 . on friday, three times as many adult tickets as child tickets were sold, for a total sales of $854.40 . how many child tickets were sold that day?

24 child tickets were sold that day.

Explanation

Lets assume, the number of child tickets sold is  

As there are three times as many adult tickets as child tickets were sold, so the number of adult tickets will be  

Cost of each child ticket is $6.20 and cost of each adult ticket is $9.80

So, the total cost of x child tickets = $ 6.20x

and the total cost of 3x adult tickets = $9.80× 3x = $29.40x

Total amount of sales is given as $854.40 , so the equation will be...

So, 24 child tickets were sold that day.

b

step-by-step explanation:

the word superfluous means unnecessary

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.