# There are five boys to every nine girls in an introductory biology course. If there are 406 406 students enrolled in the course, how many are boys?

The number of boys is three hundred and thirty-eight, and the number of girls is sixty-eight. Can you explain what an expression is in the context of mathematics? In mathematics, an expression is a combination of numbers, variables, and functions that use operators such as addition, subtraction, multiplication, and division. These expressions also include constants, variables, operations, functions, brackets, punctuation, and grouping, all of which can be represented by mathematical symbols. These symbols indicate the logical syntax of operations and other features. For instance, in an introductory biology course with four hundred and six students, if there are five boys for every nine girls, and the number of boys is B and the number of girls G, we can represent this situation with two equations: G + B = 406 and B = 5G. If we solve these equations, we find that G is sixty-eight, and therefore, the number of boys is B = 406 - 68 = 338. More information on expressions can be found at brainly.com/question/723406. #SPJ1