Evaluating algebraic expressions can be very useful in our everyday lives! Let’s look at some examples where you might need to use them:

1. Budgeting: Imagine you have a weekly budget. You can write it as $b = 100 - 10x$.

   Here, $x$ stands for how many times you visit a coffee shop. If you go twice, you can find out how much money you have left by putting $x = 2$ into the equation.

2. Cooking: Let’s say a recipe calls for $y$ cups of sugar, and the amount you need can be written as $y = 2x + 1$.

   In this case, $x$ is the number of batches you want to make. If you want to make 3 batches, plug in $x = 3$ to see how much sugar you will need.

3. Distance Travelled: You can figure out how far you traveled using the formula $d = 60t$.

   In this formula, $t$ is the number of hours you’ve been traveling. So, if you travel for 4 hours, put in $t = 4$ to find out that you traveled $d = 240$ miles.

Using these expressions makes it easier to make decisions and helps you plan better!