G7 Review Algebra and Linear Equation

8x - 3y - 21 = 0

Which are two incorrects statement below?

• the variables are x and y

• the coefficients are 8 and 3

• the constant is 21

• the coefficients are 8 and -3

10. Simplify the following

11. 28m + 20n + (−25n) + (−18m)

• -10m + 5n

• 46m - 5n

• 10m -5n

• -46m + 5n

Which is the simply form of 12a −(−15b) + (−48a) + 7b?

• -36a + 22b

• 60a + 8b

• -36a -22b

• -60a -8b

Expand and simplify

5 (4x + 2y) -2 (-5x -7y) =

• 10x - 6y

• 10x + 6y

• 30x - 24y

• 30x + 24y

Expand and simplify the following algebra

7a (5b - 8y)

• 35a - 56y

• 35ab + 56ay

• 35ab - 56ay

• 35ab - 56y

Factor the expression 2x² + 8x .

• 2x (x + 2)

• 2 (x + 4)

• x (2x + 8)

• 2x (x + 4)

Factorize: 7x² −14x

• 7x (x - 2x)

• 7x (x -2x)

• 7x (x + 2)

• 7x (x - 2)

factorise -28ay + 49a + 21y

• 7 (- 4 ay + 7a + 3y)

• 7a (- 4y + 7 + 3y)

• 7 (- 4ay + 7 + 3y)

• 7a (- 4y + 7 + 3)

Solve the linear equation 3x - 7 = 11

• x = 6

• x = 4

• x = 5

• x = 3

What is the solution to the equation 2x + 3 = -7 ?

• x = 2

• x = -2

• x = 5

• x = -5