A mathematical sentence built from expressions using one or more equal signs.

Examples:

y = 2x + 7

4x + 5 = 7x – 10

2 + 2 + 2 = 2 + 4 = 6

To substitute numerical values for all variables in an expression and then compute the value of the expression.

Examples:

__________ 12 – m  when m = 8 → 12 – 8 = 4

__________ 2x + 7 when x = 2 →  2 × 2 + 7 = 11.

An action or procedure that produces a new value from one or more input values.

Examples:

2 + 4 is applying the __________ of addition to the values 2 and 4 to produce the new value 6.

2 ÷ 4 is applying the __________ of division to the values 2 and 4 to produce the new value 0.5.

The result of dividing one number by another.

Examples:

The __________ of 12 and 3 is 4.

The __________ of 3 and 12 is 0.25.

How much the dependent variable changes when the independent variable changes by 1 unit.

Example:

If pressure changes by 0.44 psi for every one-foot change in depth, then the __________ is 0.44 psi per foot.

To replace each value of a variable in an expression or equation with another expression.

Examples:

__________ 2 for x in 2x + 7 → 2 × 2 + 7.

__________ 7 for y in 20 – y → 20 – 7.