At the movie theatre, child admission is $6.50 and adult admission is $9.80. on saturday, 153 tickets were sold for a total sales of $1222.20. how many child tickets were sold that day?

C + A = 173

6.50* C + 9.80*A = 1368.70  

Solves the first equation for C and multiplies the second equation by 10 to clear the decimals:

C = 173 - A

65C + 98A = 13687  

65 ( 173 - A ) + 98A = 13687

11245 - 65A + 98A = 13687

33A + 11245 = 13687

33A = 13687 - 11245

33A = 2442

A = 74

C = 99

Step-by-step explanation:

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.