Semester 1 Revision

Linear Equations

100

Solve

7x +5 = 54

x = 7

200

Solve

12 - 3x = 0

x = -4

300

99/11-5=6

x = 11

400

3x-3=7x+9

x=-3

500

58 - 2x = 93

x=-17.5

Linear Inequalities

100

Graph this inequality

x>6

Teacher to check

200

Graph this inequality

-3<x<14

Teacher to check

300

Solve this inequality

5x+4 > -6

x > -2

400

Solve this inequality

-x/2 +3 <-7

x>20

500

-7x-3<-7

x>-3

Rearrange Formulas

100

Rearrange into y=mx+b

y-7+3x=0

y = -3x + 7

200

Rearrange into y=mx+b

5y+20=15x

y=3x-4

300

Rearrange into y=mx+b

12-2y+6x=0

y=3x+6

400

Rearrange into y=mx+b

2x + 3y = 7

y=-2/3x+2.3

Simultaneous Equations

400

Use substitution

y=3x        4x+2y=30

x=3

y=9

500

Use Elimination

3x+2y=4

x-2y=-12

x=-2

y=5

Equations of lines

100

The equation of a line with a gradient of 6 and a y-intercept of -4

y=6x-4

200

The equation of a line with a point at (0, 5) and a gradient of -7.

y=-7x +5

400

The equation of a line with a point at (5, -2) and a gradient of -4

y=-4x+18

500

The equation of a line with these two points

(-1, -2) and (5,1)

y=1/2x-1.5