Beginning Expressions

• 2y-2
• x²+2y-2
• 2x²-2y+2
• -2y+2

Which expression contains three variables?

• 2x - 4y +12

• 4t - 5s +x

• 3 + 8 -3z

• 2p ( 4y )

A symbol for an unknown value is called a _______________. It is usually a letter such as a, X or Y.

• Constant

• Coefficient

• Operator

• Variable

Simplify: 10n - 13n

• 3n

• -3n

• -23n

• 23n

Simplify the expression: 2x + 1 + 7x 

• 10x

• 10

• 9x + 1

• 9 + 1x

Simplify the expression:
4(5b - 6f - c)

• 20b - 24f - 4c

• 9b - 10f - 4c

• 45b - 46f - 4c

• 20b + 24f + 4c

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4

• 2a + 2b + 4

• 8ab

• 4ab + 4

Combine like terms
3x + 2x + 3y - 7y

• 5x + 10y

• 5x + 4y

• 5x - 4y

• 5x -10y

Simplify    
5(2 - 7n)

• 52 - 7n

• 10 - 7n

• 10 - 35n

• 10 + 35n

Simplify  
6(x + -2)

• 6x + -2

• 6x + -12

• 4x

• 6x - 2