Unit 3 Review (M7)

Front

What does the inequality 2k - 9 ≤ -19 represent?

Back

It represents a range of values for k that satisfy the condition, specifically k ≤ -5.

Front

When graphing an inequality, what does an open dot indicate?

Back

An open dot indicates that the value is not included in the solution set, used for < and >.

Front

How do you write an equation to find the cost of one pencil if April had $24 and spent some on 7 pencils, leaving her with $10?

Back

n = cost of 1 pencil; 7n + 10 = 24.

Front

What is the equation to determine the total cost of a phone call that includes a base charge and a per-minute charge?

Back

c = 3.00 + 0.15m.

Front

What is the first step to solve the equation 2x + 11 = 23?

Back

Subtract 11 from both sides.

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions using symbols like <, >, ≤, or ≥.

Front

What does the symbol ≤ mean in an inequality?

Back

It means 'less than or equal to'.

Front

How do you isolate a variable in an equation?

Back

You perform inverse operations to both sides of the equation to get the variable alone.

Front

What is the solution to the inequality 3x + 2 > 11?

Back

x > 3.

Front

What is the difference between an equation and an inequality?

Back

An equation states that two expressions are equal, while an inequality shows that one expression is greater or less than another.