Yr 8 nelson ch 3 algebra test

Which one of the following expressions is equal to 3a?

• a+a+a

• 3a x 1a

• 3a - a

• 3a / a

• 4 x a x b

• a x b x b

• a x b x 2

• a x a x b x b

Simplify 3ku x 4ru.

• 12kru

• 12kru²

• 7kru

• 7kru²

• 11

• 18

• 3

• 5

Simplify 3x + 7 + 2x - 4

• 5x + 3

• 5x - 3

• x - 11

• x + 11

Expand 3b(b - 7)

• 6b - 7

• 6b - 21b

Factorise 3x + 6

• 3(x+6)

• 3(x+2)

• x(3+6)

• 3x(x+2)

If f = -1, evaluate 2(f + 4).

• -8

• -10

• 6

• 3

  Simplify -5d + e - 3d + e

• -2d

• -2d + 2e

• -8d

• -8d + 2e

Which algebraic expression means ‘the number 4 less than y’?

• y - 4

• -4 - y

• 4 - y

• 4 / y