Write 6.43 x 105 as an ordinary number

Work out the value of 2 x 10-7 x 8 x 10-12 giving your answer in Standard Form

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7)

Enlarge triangle ‘A’ by scale factor -1.5 with centre 0

8)

9)

10) Write this as a single fraction

11) Cancel:

12) Solve

13) Factorise:

a) 9x + 12 b) 12x2y - 4yx2 c) 9x2 – 16 d) 2x2 – 5x – 12 e) x2 + 12x + 27

14) The probability that I eat pancakes for breakfast in the morning is 1/3. Independent of this the probability that I my daughter eats pancakes is ¾ .

What is the probability that at least one of us has pancakes for break fast?

15)

The shape is a parallelogram.

Use this to explain why 4x + 20 = 180

Hence find the size of the angle B

x + 5 3x + 15

B