) Daniel's school is selling tickets to a fall musical. On the first day of ticket sales the school sold 12 adult tickets and 6 child tickets for a total of $108. The school took in $128 on the second day
by selling 2 adult tickets and 12 child tickets. What is the price each of one adult ticket and one
child ticket?
pls help this is due in five mins

$10 for child tickets and $4 for adult tickets.                                                      

Step-by-step explanation:

Let a = price of adult tickets

     c = price of child tickets

(1)    12a + 6c = 108           (2)    2a + 12c = 128    Multiply (2) by -6

      -12a - 72c = -768

              -66c = -660

                   c = $10                   2a + 12(10) = 128

                                                  2a + 120 = 128

                                                              2a = 8

                                                                a = $4

Something is wrong.  The adult tickets should be more than the child tickets.

But,  according to the info you have given, it comes out to $10 for child tickets and $4 for adult tickets.                                                        

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!