Semester Exam Review Day 1 Ch 4 Equations & Inequalities (Math7)

Front

What does the inequality 2 > p represent on a number line?

Back

The inequality 2 > p means that p can take any value less than 2. On a number line, this is represented by an open circle at 2 and a shaded line extending to the left.

Front

How do you solve the equation 5 - 2x = 12?

Back

To solve for x, first subtract 5 from both sides: -2x = 12 - 5, which simplifies to -2x = 7. Then, divide both sides by -2: x = -7/2.

Front

What inequality represents 'more than twenty students'?

Back

The inequality is s > 20, where s represents the number of students.

Front

What is the solution to the equation x + 5 = 15?

Back

To solve for x, subtract 5 from both sides: x = 15 - 5, which simplifies to x = 10.

Front

How do you solve the inequality 3x ≥ 9?

Back

To solve for x, divide both sides by 3: x ≥ 9/3, which simplifies to x ≥ 3.

Front

What is the definition of an inequality?

Back

An inequality is a mathematical statement that compares two expressions, showing that one is greater than, less than, or not equal to the other.

Front

What does the symbol '≥' mean?

Back

The symbol '≥' means 'greater than or equal to'.

Front

What does the symbol '<' mean?

Back

The symbol '<' means 'less than'.

Front

How do you graph the inequality x < 4?

Back

To graph x < 4, draw a number line, place an open circle at 4, and shade to the left to indicate all numbers less than 4.

Front

What is the solution to the equation 2x - 3 = 5?

Back

To solve for x, add 3 to both sides: 2x = 5 + 3, which simplifies to 2x = 8. Then, divide both sides by 2: x = 4.