G7 ALG : EXPANSION (1)

Simplify

4(3a + b) = 12a - 4b

• True

• False

Simplify

4a ( 2b + 3c - 2d) =

• 8b + 12c - 8d

• 6ab + 7ac - 6ad

• 8ab - 12ac - 8ad

• 8ab + 12ac - 8ad

Simplify

–2(2x² + 3x – 4) =

• –2x² + 6x – 8

• – 4x² – 6x + 8

• –4x² + 6x – 8

• – 4x² – 6x – 8

Show the perimeter in algebraic expression !

• 2x + 2y

• 4x + 4y

• 4x + 8y

• 4x + 12y

Simplify

3xy(9z + 2y - 6) =

• 27xy - 6xy +18x

• 6xyz +27xy - 18y

• 6xy² +27xyz - 18xy

• 27xyz - 6xy² - 18xy

The simplest form of

4(2x – 5y) – 5(x – 3y) =

• 3x – 2y

• 3x – 17y

• 3x – 5y

• 3x – 35y

Simplify

 $-\left(-8xy+8x^2\right)$ =

•  $8x^2+8xy$  

•  $-8x^2+8xy$  

•  $-8x^2-8xy$  

•  $8x^2-8xy$  

Simplify

 $\frac{3}{5}\left(15x-25\right)=$  

•  $9x-15$  

•  $15x-25$  

•  $18x-28$  

•  $45x-75$  

Simplify

4x + 2(3x - 4) =...

(type your answer without space, i.e. : 3x+5 )

(a)  

Sara has (x – 3y) coins of 10-cent and (2x + y) coins of 20-cent. What is the total amount of money she has, in dollars ?

(1 dollar = 100 cents)

• 0.5x - 0.1y

• 0.5x - 0.5y

• 50x - 10y

• 50x - 50y