Higher
Higher

Change the subject of a formula

Lesson details

Key learning points

  1. In this lesson, we will change the subject of a formula in which the term appears once.

Licence

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4 Questions

Q1.
Using the formula r = 5t - 3 find the value of r when t = -2
Correct answer: -13
-55
-7
7
Q2.
Using the formula r = 5t - 3 find the value of t when r = -7
Correct answer: -0.8
-1.25
-4
2
Q3.
A
B
C
Correct answer: D
Q4.
A
B
C
Correct answer: D

3 Questions

Q1.
Which of the following steps would you take first to make t the subject of the formulae x = 6t + 3
Add three to both sides
Divide boths sides by 6
Correct answer: Subtract 3 from both sides
Subtract x from boths sides
Q2.
Correct answer: He has not multiplied the 7 by 3 to give 21 on the right hand side
He has not subtracted 3g from boths sides
He has written -3g in his final answer
Q3.
A
Correct answer: B
C

Lesson appears in

UnitMaths / Substitution and Rearranging formulae