|Evaluating expressions with two variables|
|Exercise Name:||Evaluating expressions with two variables|
|Math Missions:||6th grade (U.S.) Math Mission, Algebra basics Math Mission, Algebra I Math Mission, Mathematics II Math Mission|
|Types of Problems:||1|
Types of problems
- Evaluate the following expression when equals a number; = a number: This problem gives users an expression with two unknowns along with a number. The user is required to substitute the value of those two unknowns into the expression and evaluate it.
- Knowledge of algebra is essential for higher math levels like trigonometry and calculus. Algebra also has countless applications in the real world.
- Work problems often ask us to calculate how long it will take different people working at different speeds to finish a task. The algebraic models of such situations often involve rational equations derived from the work formula, . The amount of work done () is the product of the rate of work () and the time spent working (). The work formula has 3 versions: