Forming and solving inequalities (Part 2)

Forming and solving inequalities (Part 2)

Lesson details

Key learning points

  1. In this lesson, we will set up and solve inequalities in the context of word problems.

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3 Questions

Q1.
This quiz will focus on one question. The rectangle below has a length x. Its height is 3cm longer. What is an algebraic expression for the height?
3
3x
x - 3
Correct answer: x + 3
Q2.
What is an expression for the perimeter of the rectangle?
2x + 3
4x - 6
Correct answer: 4x + 6
8x
Q3.
The perimeter is greater than or equal to 18cm. What values can x take?
Other
x > 3
x ≥ 2.5
Correct answer: x ≥ 3

3 Questions

Q1.
I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, what expression do I get?
3(x + 4)
Correct answer: 3x + 4
4(x + 3)
4x + 3
Q2.
I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, my answer is less than 19. What range of values can my number take?
x < 4
Correct answer: x < 5
x > 4
x > 5
Q3.
I'm thinking of a number, I subtract 4 from it and then divide it by 6. My number is greater than 2. What range of values can my number take?
Correct answer: x > 16
x > 24
x > 36
x > 6

Lesson appears in

UnitMaths / Forming and solving inequalities