At a local zoo a child ticket costs $8.50 and an adult ticket costs $12.50. on one weekend in june they sold a total $1,374 worth of 140 tickets, what system of equations can be used to find how many of each ticket was sold?

Can someone me with my hwplz(only the circled ones)

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion