Unit 2 Quiz Make Up

What is a variable?

• A letter in math that stands for other letters.

• A symbol that means change.

• A letter in math that stands for an unknown number.

• A symbol that means to multiply.

What is an expression?

• Combination of numbers, operations, and variables.

• An equation.

• When you replace a variable with a number.

• I don't know, Mr. Soto.

What is the word we use to help us remember the correct order of operations?

• Substitution

• Variable

• Parenthesis

• PEMDAS

y + 18        ,for y= 23

• 414
• 41
• 5

2x + 3 + x²; for x = 4

• 17
• 27
• 19
• 25

Evaluate when a = 15:
2(a - 5) + 2

• 22
• 27
• 14
• 7

Simplify 5b x 5b²

• 25b³

• 25b²

• 25b¹

• 25

Simplify.

(5cd⁴) (2c³d²)

• 10c⁴d⁶

• 7c⁴d⁶

• 7c³d⁸

• 10c³d⁸

How many terms are in the following expression?
8n + 2 - 7x

• 1
• 2
• 3
• 4