Year 9 Jeopardy!!!

Financial

100

Joash earns $75.80 an hour. How much is he paid for working for 13 hours?

$985.40

200

Rehoboam earns $640 a week. How much would he be paid for a four week holiday with 17.5% holiday loading?

$3008

300

$4700 is invested at a flat-rate of 1.5% p.a. for 8 years. How much interest is earned?

$564

400

Jonah paid a $200 deposit and $112 monthly instalments for 3 years to pay off a $3250 TV. How much interest did he pay?

$982

500

How much tax would Ruth need to pay if she has a taxable income of $20 000?

$342

Products

100

Expand 3(5y+2)

15y + 6

200

Expand (x+8)(x-5)

x² + 3x - 40

300

Expand (4x-1)²

16x² - 8x + 1

400

7(x-6) - 2(3x+7)

x - 56

500

Expand and simplify:

(a+b)² - (a-b)²

4ab

Factors

100

Factorise 12x - 32

4(3x-8)

200

Factorise p² - 81

(p-9)(p+9)

300

Factorise x²+9x+18

(x+3)(x+6)

400

Factorise 6xy - 14x + 21y - 49

(2x+7)(3y-7)

500

Factorise 6m² + 13m + 2

(6m+1)(m+2)

Equations

100

Solve x + 5 = 8

x = 3

200

Solve 2x - 5 = 13

x = 9

300

Solve (5x+8)/2 = 15

x = 4.4

400

4x + 19 = 25 - 5x

x = 2/3

500

Rearrange 3xy² + 2 = h to make x the subject.

x = (h-2)/3y²

Linear Relationships

100

What are the coordinates of the origin?

(0, 0)

200

Which quadrant is the point (-4, 7) in?

The 2nd quadrant

300

What are the coordinates of the midpoint between (6, 4) and (-4, 11)?

(1, 7.5)

400

What is the gradient of the line connecting the two points (5, 3) and (2, 7)?

m = -4/3

500

What are the x- and y- intercepts of the equation 3x + 4y = 9

x = 3 and y = 2.25