Solving Equations Substituting Variables Algebra Two

Which of the following relations is an identity (always true)?

• x + x = 2x

• x + x = 3x

• x = y

• 1 + 1 = 3

Which of the following relations is an open sentence?

• 3^2=9

• 3^2=6

• 3^x=9

• None of these

___________________ is the name for the set of tools we use to find solutions to relations (or vice versa.)

• Algebra

• Geometry

• Statistics

• Calculus

A/an ___________________ is a letter that represents an unknown quantity, or a quantity with a value that could change.

• Variable

• Equation

• Expression

• Inequality

A solution is a number or numbers that, when substituted in for the variable or variables in a relation, makes that relation ____________

• True

• False

• Open

• Undetermined

Two expressions are said to be ___________________ if  and only if they represent the same value.

• Elementary

• Equivalent

• Elevated

• Embossed

When ___________________, it is always a good idea to use parentheses

• Substituting

• Simplifying

• Solving

• Distributing

Solve the equation: 3x - 5 = 16

• 2

• -7

• 7

• 9

Solve the equation: 2x + 5 = 17

• 8

• 10

• 3

• 6

Solve the equation: 3(x - 4) = 15

• 9

• 18

• 12

• 6