Evaluating/Writing Expressions

Evaluate the expression -3x - 9 for x = -2.

• -3

• -15

• 3

• 6x - 9

Perry has 17 fewer baseball cards than Pete.
If b represents the number of cards Pete has, write an expression for how many baseball cards Perry has.

• b + 17
• b -17
• 17 - b
• 17 + b

Mary baked some cookies on Saturday. On Sunday she baked twice as many cookies as the day before. If c represents the number of cookies she made on Saturday, write an expression for the number of cookies she made on Sunday.

• c + 2
• c - 2
• c / 2
• 2c

Students brought in 300 canned goods for the food drive on Monday. On Tuesday students brought in x more than the day before. Write an expression for how many canned goods students brought on Tuesday.

• 300 + x
• 300 - x
• 300x
• x - 300

Sarah has some money in the bank, then she earned $12 more. Define a variable and write an expression for how much money she has in total.

• b = bank
  b + 12
• m = money
  m + 12
• m= amount of money she has in the bank
  m + 12
• m = amount of money she earned
  m + 12

Translate:
42 less than a number x

• 42 - x
• x - 42

Translate:
12 fewer pencils than the number of pencils, p, in my desk

• 12 - p
• p - 12

Translate:
4 more than three times the amount of  c   candy bars

• 3c + 4
• 3c - 4
• 4c + 3
• 4c - 3

Evaluate x + 8 if x = 2

• 6

• 8

• 10

• 12

Evaluate 4a  if a=5

• 45
• 9
• 20