Solve for x: 5x + 2 = 4x - 9.
07
O-7
O 11
0-11

An equation where variables are used to represent known values—function notation true or false

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Match the one-to-one functions with the graphs of their inverse functions.