There are 45 students signed up for a performance band while 30 are signed up for a jazz band. if 19 students are signed up for both bands, then how many students are signed up for only one of the two bands?

i tend to overthink constantly and i ended up with two answers: 56 students and 37 students. i am pretty sure it is 56 but i really need to double check. plz me

Mr.zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?