(a) Factorise 3x2 – x
(1)
(b) Expand 4(2y + 3)
(1)
C = 5a + 4d
(c) Work out the value of C when a = –3 and d
= 6
C =
(2)
P = 3t2 + 7t
(d) Work out the value of P when t = – 4
P =
(2)
(a) Solve 7x + 3 = x – 18
x =
(2)
(b) Make w the subject of t = 7w + 3
(2)
Pencils cost 2 dollars each.
Rulers cost 3 dollars each.
Edith buys p pencils and r rulers.
The total cost is T dollars.
(c) Write down a formula for T in terms of p and r
.
(3)