Solving for Unknown Numbers

A letter or symbol that represents an unknown value is called ______________.

• Variable

• Radicand

• Coefficient

• Constant

When you add a number to each side of an equation, you are using the ___________.

• Addition Property of Equality

• Subtraction Property of Equality

• Multiplication Property of Equality

• Division Property of Equality

When you use the reciprocal of a fractional coefficient to each side of an equation, you use the ___________.

• Addition Property of Equality

• Subtraction Property of Equality

• Multiplication Property of Equality

• Division Property of Equality

A value that when substituted for the variable will make an equation true is a ____________.

• Term

• Constant

• Evaluation

• Solution

What is the language of algebra used for?

• Studying animal behavior

• Analyzing chemical reactions

• Describing historical events

• Representing and solving problems involving unknown quantities

How does algebra help in representing relationships between quantities?

• By avoiding equations

• By guessing randomly

• By using only numbers

• By using variables to represent unknown quantities

What is the relationship between variables and unknown quantities in algebra?

• Variables have no relationship with quantities

• Variables represent known quantities

• Variables represent unknown quantities

• Variables are irrelevant in algebra

What is the solution to the equation 3x - 5 = 7?

• x = 3

• x = 5

• x = 4

• x = 2

What is the solution to the equation 2y - 8 = 10?

• y = 9

• y = 5

• y = 7

• y = 6

What is the first step in solving the equation 4(x + 2) = 20?

• Subtract 2

• Distribute the 4

• Combine like terms

• Divide by 4