Year 8
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Lesson details
Key learning points
- In this lesson, we will continue our work on substituting into inequalities, this time considering negative numbers in more detail.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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3 Questions
Q1.
Which of the following values of x satisfy the inequality x + 2 < 11 ? Select ONE
x = 10
x = 11
x = 9
Q2.
Which of these statements are true if x = 2? Select all that apply.
11 < 13 - x
2x ≤ 3
Q3.
Which of the following inequalities is satisfied if x = 3 and y = 4?
3x + 4y < 25
3x + 4y > 25
4x + 3y > 25
3 Questions
Q1.
Given that x = 6 and y = -5, which of the following statements is false? It may help to sketch a number line.
-7 < y
x ≤ 7
y ≤ -4
Q2.
Given that a = -3, which of the following statements is false? It may help to sketch a number line.
-3 ≤ a
-a = 3
a ≤ -2
Q3.
Look at the diagram. Which of these statements is true according to the diagram?
p < -q
p < r
r > -q