Evaluating Expressions Given the Value of X and Y

Simplify: 6x + 12x + 3 y

• 21x

• 18x + 3y

• 72x + 3y

• 6x + 15y

When solving (evaluating) expressions, substitute the given value for each variable and then use the order of operations.

• True

• False

An expression that contains one or more variables and may also contain operation symbols, is called an

• algebraic expression

• numerical expression

• facial expression

Let x = 4 and y = 3. Evaluate 3x - 4y.

• 6

• 0

• 2

• -12

Evaluate 2x  if     x = 10

• 210

• 20

• 12

Evaluate x + y + z + a - c when x=11, y = 3, z = 4, a = 14 and c=10?

• 22

• 32

• 2

• 17

Evaluate the expression when x = 7 and y = 4
xy - 4(2)

• 3

• 20

• 48

2x + 5(y - 1) when x=8 and y=5

• 20

• 31

• 36

• -4

Evaluate the expression for the given value of the variable.
3x + 5 when x = 5

• 18

• 20

• 200

• 15

What are the terms of the expression 5x - 3y + 4?

• 5, 3, and 4

•  5x and 3y

• 5x, 3y, and 4

• 5x, -3y, and 4