3.) What is a fixed quantity that has a specific value and does not change? a. Expression b. Variable 4.) What do you call a quantity with no specific value and is represented by small letters of the alphabet? \( \begin{array}{llll}\text { a. Expression } & \text { b. Variable } & \text { c. Constant } & \text { d. Equation }\end{array} \)

A constant is a fixed quantity that always retains its specific value throughout calculations, like the number 5 or the value of \(\pi\). They're like steadfast friends in math—always reliable and never changing! In contrast, variables, often represented by letters like \(x\) or \(y\), love to keep us on our toes by taking on different values depending on the context of the problem. Variables are essential in algebra and beyond; they allow us to formulate equations and express relationships. Imagine being an engineer designing a bridge—variables can represent things like weight or stress, adapting to different scenarios. So, just like a superhero's identity can change but the hero remains, variables can shift while still helping you solve a wide array of problems!