LESSON 2-3 - LIVE LESSON - Evaluating Algebraic Expressions

LESSON 2-3

LIVE LESSON

Evaluating Algebraic Expressions

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Multiple Choice

Which of these is equivalent to x + x ??

• 2x

• x²

Multiple Choice

Which of these is equivalent to x + x + x + x + x ??

• 5x

• x⁵

Multiple Choice

Which of these is equivalent to 11x + 9x ??

• 20x

• 20

Multiple Choice

Which of these is equivalent to 19x + x ??

• 20x

• 20

Multiple Choice

Which of these is NOT equivalent to 20x ??

• 17x + 3y

• 12x + 8x

• 15x + 5x

• 10x + 10x

Multiple Choice

EVALUATE 2x + 5

for x = 2

• 9

• 7

• 27

Multiple Choice

Evaluate 2x + 5

for x = 25

• 95

• 55

• 75

Multiple Choice

Evaluate 5x + 22 for x = 10

• 70

• 72

• 77

Multiple Choice

Find 10 + 2y

for and y = -11

• -12

• -32

• -22

Multiple Choice

Find 5x + 2y for x = 10 and y = 11

• 21

• 61

• 72

Multiple Choice

Find x + 2y

for x = 10 and y = -11

• -12

• -32

• -22

Multiple Choice

Evaluate 2x + 4y + 10z

for x = 100 y = 50 and z = -10

• 300

• 400

• 500

Multiple Choice

Evaluate 5x + 10y + 20z

for x = 100 y = 50 and z = -10

• 900

• 800

• 840

Multiple Choice

Evaluate xy + yz

for x = 100 y = 50 and z = -10

• 4500

• 5000

• 5500

Multiple Choice

Evaluate y ( x + z )

for x = 100 y = 50 and z = -10

• 4500

• 5000

• 5500

Multiple Choice

In Algebra, why do letters make the best varialbles??

• it's too easy to confuse letters with numbers - we should scrap Algebra and learn something totally useless but fun

• it's very challenging to confuse a letter with a number - letters make the best unknown values or place holders for numbers