Answer:1)The required equation 77000+500t=137000
2) Cost of 1 orchestra ticket is $12.
Step-by-step explanation:
The total amount the opera house made in ticket on Saturday =$137000
No. of mezzanine tickets they sold =1100
cost of 1 mezzanine ticket = $70
∴cost of 110 mezzanine tickets=1100×70 =$77000...............(1)
Now let t be the cost of orchestra ticket then
cost of 500 tickets =550×t=$500t................................(2)
Adding (1)and (2)is equal to the total sales,so the required equation 77000+500t=137000
⇒500t=137000-77000(subtract 77000 on both sides)
⇒500t=6000⇒t=12(dividing 500 from both sides)
∴ Cost of 1 orchestra ticket is $12.