MA138 Exam 1 in-class review

Front

What does the equation m + n = n + m demonstrate?

Back

Commutativity of addition: The order in which two numbers are added does not change the sum.

Front

Write an algebraic equation for your pay, P, if you are paid $12 per hour and t represents the number of hours worked.

Back

P = 12t

Front

Does the relationship between time and temperature in University 003 describe a function?

Back

Yes, each time corresponds to one temperature.

Front

What does the equation m + (n + p) = (n + m) + p demonstrate?

Back

Associativity of addition: The way in which numbers are grouped in addition does not change the sum.

Front

Does the relationship between the weight of a box and its contents describe a function?

Back

No, the weight can vary with different combinations of contents.

Front

Define the Commutative Property of Addition.

Back

The Commutative Property of Addition states that changing the order of the addends does not change the sum.

Front

Define the Associative Property of Addition.

Back

The Associative Property of Addition states that the way in which numbers are grouped does not change the sum.

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols.

Front

What is a function in mathematics?

Back

A function is a relation that assigns exactly one output for each input.

Front

What is the definition of an independent variable?

Back

An independent variable is a variable that represents the input or cause in a function.