Formulae - Topic 4

Question 1

p = s + r (s)

Answer 1

p - r = s

s + p - r

Question 2

n = p - q (p)

Answer 2

n + q = p

p = n + q

Question 3

x = 2y (y)

Answer 3

y = x/2

Question 4

n = p/q (p)

Answer 4

p = nq

Question 5

p = 2s + r (s)

Answer 5

p/2 = s + r

p - r/2 = s

Question 6

z = x - y/3 (y)

Answer 6

3z - 3x = y

Question 7

c (x -d) = e (x)

Answer 7

cx - cd = e
cx = e + cd
x = e + cd/c

Question 8

5, 9, 13, 17, 21… (2)

Answer 8

25, 29

Question 9

3, 5, 7, 9, 11… (2) (nth number)

Answer 9

13, 15

2n + 1

Question 10

1/6, 2/7, 3/8, 4/9, 5/10… (2) (nth term)

Answer 10

7/11, 8/12

n/n + 5