Simplify these expressions:

4x² - 3x - 8x + 2x

• 7x - 10x

• 4x² - 9x

• 4x² + 13x

• 7x²

Simplify these expression:

z − 2z - 9z

• -3z

• -10z

• 15z

• 16z

Expand these expression:
 $2f(f-8a)$  

•  $2f^2-16af$  

•  $2f^2-2af$  

•  $2f-16$  

•  $2f^2-8a$  

 $3(x+4)+5(x-6)$  

Expand and simplify the expression.

•  $50x+42$  

•  $50x$  

•  $8x+42$  

•  $8x-18$  

 $x(x-2)-x(x-5)$  

Expand and simplify this expression.

•  $2x^2+3x$  

•  $-3x$  

•  $2x^2-3x$  

•  $3x$  

Razi thinks of a number. He multiplies it by 5 then subtracts 187. The answer is1968 .

What number did Razi think of?

Mia thinks of a number. She multiplies it by 7 then subtracts 11. The answer is the

same as 6 times the number plus 22.

Find the following amount:

50% of 406 people

• 406

• 604

• 203

• 302

Simplify these expressions:

4x² - 3x - 8x + 2x

• 7x - 10x

• 4x² - 9x

• 4x² + 13x

• 7x²