Equations and rearranging formulae

Review of Fractions

Multiple Choice

1/4+1/8=

• 2/12

• 3/8

• 12/12

Multiple Choice

15% of 200 is?

• 30

• 15

• 300

Equations and rearranging

​Key words:

Expansion
linear equation
Solution
Common factor
Factorisation
Variable
Subject

• Factorize an algebraic expression where all terms have common factor

• rearrange the formula to change the subject

• Expand brackets that were multiplied by negative number

• solve linear equations

Objectives:

​Leonhard Euler (1707–1783) was a great Swiss mathematician. He formalised much of the algebraic terminology and notation that is used today

​EX:

1. -3(x+4)=

2. 4(y-7)-5(3y+5)=

3. 8(p+4)-10(9p-6)=

Draw

-5(4y+0.2)

Multiple Choice

-2(5h+5k-8j)=

• 10k-10h-16j

• -10h-10k+16j

• +10h+10k+16j

​Solving linear equations(Ex 6.2 no1 i-n pg 127)

EX: Solve the equation
5x-2=3x+6 2(y-4)+4(y+2)=30

Multiple Choice

4x+3=31

• x=7

• x=17/2

• x=8

Multiple Choice

12x+1=7x+11

• x=2

• x=12/19

• x=12

EX:

Multiple Choice

solve: 3^3x=27

• x=3

• x=1

• x=0

Multiple Choice

4^3x=2^x+1

• x=1/5

• x=5

• x=1/2

• x=2