Revision

Solving Equations

100

3x+2= -19

x = -7

200

-3(x+4)= -27

x=5

300

5x+4 = 3x+8

x = 2

400

5x - 45 = 18 - 4x

x=7

Expand Brackets

100

-2(x+2)

-2x - 4

200

5(x+7-2y) - 3

5x -10y + 32

300

(x+2)(x-4)

x²-2x-8

400

(3x-7)(5x+1)

15x²-32x-7

Probability

100

There are 5 blue marbles in a bag of 20.

What is P(Blue)?

P(Blue) = 1/4

200

Explain what P(rain')= 0.35 means in words to someone who is not well versed in probability

There is a 35% chance that it will not rain

(or a 65% chance it will rain)

300

The probability of Jenna being late to school is 1/4

The probability of Louix being late to school is 1/5.

What is the probability Jenna and Louix are both late to school on the same day?

P(Both late) = 1/20

400

A target is fully destroyed if it is hit three times in a row.

The probability of hitting the target on any given shot is 0.4

What is the probability the target is NOT fully destroyed in 3 shots?

P(Destroyed ' ) = 0.936

Random

100

What is the formula for area of a circle?

A = pi r²

200

What is the length of the hypotenuse of a triangle if the two short sides are 3cm and 4cm?

hypotenuse = 5cm

300

What is the angle formed in a triangle between an adjacent side = 4cm and an opposite side = 8cm?

angle = 63.4 degrees

400

Calculate the area of a donut shape with inner circle radius 3cm and outer circle radius 6cm

84.8cm²