# Evaluating algebraic expressions

##### Intros

##### Examples

###### Lessons

- Below we have used ponds and tadpoles to model an expression. Write the expression and use the variable x to represent the unknown number of tadpoles in each pond.
- Mary bought $s$ packages of stickers, and there are 10 stickers in each package. Write an expression to show how many stickers Mary bought.
- Write an expression for each phrase. Then, evaluate the expression.
- Evaluate the following expression, if $x = 7$ and $y = 9$

###### Free to Join!

StudyPug is a learning help platform covering math and science from grade 4 all the way to second year university. Our video tutorials, unlimited practice problems, and step-by-step explanations provide you or your child with all the help you need to master concepts. On top of that, it's fun — with achievements, customizable avatars, and awards to keep you motivated.

#### Easily See Your Progress

We track the progress you've made on a topic so you know what you've done. From the course view you can easily see what topics have what and the progress you've made on them. Fill the rings to completely master that section or mouse over the icon to see more details.#### Make Use of Our Learning Aids

#### Earn Achievements as You Learn

Make the most of your time as you use StudyPug to help you achieve your goals. Earn fun little badges the more you watch, practice, and use our service.#### Create and Customize Your Avatar

Play with our fun little avatar builder to create and customize your own avatar on StudyPug. Choose your face, eye colour, hair colour and style, and background. Unlock more options the more you use StudyPug.

###### Topic Notes

In this section, we are given models of cups and counters and asked to write the expressions represented by these models. We then use the variable x to represent the number of counters in each cup. We were first taught how to write expressions and solve for variables in a previous section. In this section, we are also asked to draw cup and counter models of given expressions. Finally, we are asked to write expressions for given phrases and evaluate the expressions using our variables.

2

videos

remaining today

remaining today

5

practice questions

remaining today

remaining today