Algebraic Expressions

A variable is...

An algebraic expression is..

Identify the coefficient in the expression 3x

• 3

• x

Which is an example of an algebraic expression...

• 2 + 4

• -4x + y

Evaluate the expression 3u² for u= -1

• 3

• -3

• 31

• -31

Evaluate the expression 4r - 10s for r = 5 and s = 2

• -57

• 0

• 40

Evaluate

 $\frac{s}{2}$  for s = -2

• -1

• 0

• 1

The expression

 $\frac{w}{6}$   gives the weight of an object on the moon in pounds with a weight of w pounds on Earth.  What is the weight of a space suit on the moon if the space suit weighs 178.2 pounds on Earth. 

The seventh grade math classes are going on a field trip. The field trip will cost $7 per student. Write an expression to find the cost of the field trip for s students. What is the total cost if 26 students go on the trip?

*Be sure to answer all parts of the question.

Write an expression to represent the total number of legs on h horses and c chickens. How many legs are there in 5 horses and 6 chickens?

*Be sure to answer all parts of the question.