y9 semester 1 review

term 1+2

100

increase 16 by 25 percent

20

200

decrease 150 by 40 percent

90

300

expand the brackets

(x - 3)(2x + 6)

2x² - 18

400

simplify x³ * x^-5

x^-2

500

3²  - 4 + 12(2+2)

53

yikes

100

subtract the fractions 8/3 - 1/4

29/12

200

(-7)- (-8)=

Answer 1

300

Solve 4+8÷2x3-1=

15

400

write this number in standard form

0.000234

2.34*10^-4

500

add the fractions 3/5 + 2/7

31/35

angles and riddles

100

what is the sum of the interior angles of a pentagon?

540

200

what is the measure of each angle in a regular octagon?

135

300

two sides of a right triangle are 6cm and 10cm (the hypotenuse). what is the length of the last side?

8cm

400

When I was 6, my sister was half my age. Now, I'm 70. How old is my sister? 

**DOUBLE POINTS**

67 years old