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Textbook Answers – Changing the Subject

July 19, 2016

Workout

Question 1:

(a)   y = c – w          (b)   y = m + p         (c)   y = s – m

(d)   y = n + 2g       (e)  Snip20160719_14          (f)   Snip20160719_15

(g)  y = cw              (h)  y = 2ac              (i)   y = a – p

(j)  y = c + k          (k)  y = √s                 (l)  y = ∛x

(m)  y = g²           (n)   Snip20160719_16            (o)  y = n – t

(p)   Snip20160719_17        (q)  Snip20160719_18          (r)   y = c + r – 7t

(s)  Snip20160719_19            (t)  Snip20160719_20   (u)  Snip20160719_21

Question 2:

(a)  Snip20160719_22             (b)  Snip20160719_23          (c)  Snip20160719_24

(d) Snip20160719_25         (e)  Snip20160719_26    (f)  Snip20160719_27

(g)   x = n(w – 2)          (h)  x = 6(w + 5)     (i)  x = ch – 3

(j)  Snip20160719_28           (k)  Snip20160719_29   (l)  Snip20160719_30

(m)  x = 2cm – t         (n)  x = 3uz – w       (o)  Snip20160719_31

(p)  Snip20160719_32              (q)   Snip20160719_33              (r)  Snip20160719_34

(s)  Snip20160719_35         (t)  Snip20160719_36             (u)  Snip20160719_37

Question 3:

(a)  Snip20160719_38

(b)  Snip20160719_39

(c)  Snip20160719_40

Apply

Question 1:   Snip20160719_41

Question 2:  Snip20160719_42

Question 3(a):  the a should be subtracted from both sides before square rooting

Question 3(b):  the first step is correct, but then both sides should be multiplied by 4.

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