Expansion
Expand (-3g-4h)(2).
-6g-8h
Factorise 7a+7b+7c
7(a+b+c)
Find the value of 3a+4b when a=7 and b=5
41
Andy has 2x books. Bill has 4 more books than Andy. If they have 16 books in total, how many books does Bill have?
10
3m + 50 = 20
-10
Expand -4(2x+1) + 3(-x-2)
-11x-10
Factorise 7bt - 21b - 35bt.
7b(-3-4t)
Find the value of x when
x=c2 - 2c, given c=5.
10
Mrs Chen buys 3 boxes of chocolate. She uses a $50 note to pay and gets $8 change. How much did each box cost?
$14
4y – 12 = -2y + 6
3
Expand 4m+n+[5m-6(m-n)]
3m–5n
Factorise 5ax – 15bx - 30x.
5x(a-3b-6)
Find the value of a2 + 3b2 - c2, when a=1, b=2 and c=3.
4
Halim has 4 more $50 notes than $10 notes in his wallet. If the total value of the notes is $380, how many $10 notes does he have?
3.2x – 1.5 = 1.2 – 1.3x
3/5
There are (2a+b) books in a pile. The thickness of each book is 2 cm. Find the height of the pile of books, in the simplest form.
2(2a+b)
Factorise u2v-uv
uv(u-1)
The price of a square frame of side x cm is $(1/4 x2+5x). Find the price of a square frame of side 10 cm.
$75
The total price of a teapot and 4 cups is $64. If the price of a teapot is $28, find the price of a cup.
$9
1/2 - 3x=1+2x
- 1/10
Expand and simplify
(4a-8b+12c)(- 5/2)
10(-a+2b-3c)
Factorise r(a+b) + s(a+b)
(r+s)(a+b)
The price $P for a birthday cake of radius r cm and height h cm is given by the formula P=1/25r2h. Find the price for a cake of radius 10 cm and height 8 cm.
$32
Tom is twice as old as Arul. In 4 years’ time, the sum of their ages will be 32 years.
Find Arul’s present age.
8 years old
Given that 5p - 7pw = 8w2,
find p when w = 3.
- 9/2