# Algebraic Expressions

# Constants Exercises

### Example 1

Mortimer Poindexter spends two hours every day running away from bullies. Some of the bullies he encounters are faster than others; therefore, he sometimes needs to run faster than at other times, but he is always chased for exactly two hours. (These bullies stick to a very rigid schedule.) Let *s* be the speed Mortimer runs (in miles per hour) and let *d* be the distance he travels (in miles) as he tries to make his escape. Is *s* a constant or a variable?

### Example 2

Mortimer Poindexter spends two hours every day running away from bullies. Some of the bullies he encounters are faster than others; therefore, he sometimes needs to run faster than at other times, but he is always chased for exactly two hours. (These bullies stick to a very rigid schedule.) Let *s* be the speed Mortimer runs (in miles per hour) and let *d* be the distance he travels (in miles) as he tries to make his escape. Is *d* a constant or a variable?

### Example 3

Mortimer Poindexter spends two hours every day running away from bullies. Some of the bullies he encounters are faster than others; therefore, he sometimes needs to run faster than at other times, but he is always chased for exactly two hours. (These bullies stick to a very rigid schedule.) Let *s* be the speed Mortimer runs (in miles per hour) and let *d* be the distance he travels (in miles) as he tries to make his escape. Express in symbols the relationship between *d* and *s*.