Understanding Expressions 1

Identify the variables in the expression
3x +  9

• x
• y
• 9
• 3x

How do you write this in exponent form?
4 * 4 * 4 * 4 * 4 * 4 * 4 * 4

• 4⁷
• 65,536
• 4⁸
• 7⁴

What is 6²?

• 8
• 36
• 4
• 12

The sum of seven and x

• 7-x
• x-7
• 7x
• 7+x

Five less than y

• 5+y
• 5y
• 5-y
• y-5

I think of a number multiply it by 7 and minus 8. Which expression(s), if any, represents my number now?

• A: 7x - 8

• B: 7x - 56

• C: 7(x – 8)

• D: x – 56

Write the following numerical expression as a word phrase

10 - 2

• 10 divided by 2

• the sum of 10 and 2

• the difference between 10 and 2

• the product of 10 and 2

What is the numerical expression for the word phrase below?

11 minus 9

• 11 x 9

• 11 + 9

• 11x

• 11 - 9

Is 10d + 55 an algebraic expression?

• Yes because it has 55

• No because it has a coefficient

• Yes because it has a variable

• Yes because it expresses a problem

2a + 2c + 5

how many terms? what's the constant?

• 2 terms, the constant is 2c

• 1 term, the constant is 5

• 3 terms, the constant is 5

• 3 terms, the constant is 2a