Year 9 5.2 Review

Increase 80m by 20%

• 16

• 96

• 64

• 80

Decrease $100 by 15%

• $85

• $115

• $15

• $75

Expand (3x+4)(2x-3)

• 96rx

• 16rx

• 12r+8x

• 96x

• 2xy

• 20xy

• 2y

• 10xy

Find the length of the unknown side

• 5

• 20

• 18

• 22

Express 884000 in scientific notation

How much interest does an $2000 investment earn at a rate of 3% pa for 4 years ?

• $40

• $60

• $200

• $240

A $3000 Investment earns $150 interest after 3 years, What was the interest rate ?

• 0.16%

• 1.67%

• 16%

• 167%

A group of students were asked why they skipped breakfast. The two reasons given were that they were "not hungry" and they were "too busy".

How many students skipped breakfast because they were too busy ?

• 11

• 13

• 24

• 19