How Do You Evaluate an Algebraic Expression

Sometimes you have an algebraic expression with variables, and you know the values of those variables exactly, and you just need to plug in those values and get the value of the expression. Well, if that's what you have to do, then you've come to the right place, because this tutorial will show you exactly how to do it! Evaluate the following expression if a=30 and b=10.<br/>4a + 10b + (1/2)b²