People who purchased good seats will be labeled as a people who purchased poor seats will be labeled as b therefore... 5a + 2b = 660 a + b = 210 Now, all that has to be done is for the system to be solved. -2(a+b=210)
The area of a parallelogram can be found in the same way as that of a rectangle, so base x height. To find the base we have to do area ÷ height or 18 1/3 ÷ 3 1/3= 5.5 feet