Framing Algebraic Expressions for Mathematical and Real-World Problems

Cody has $450 in his savings account. He adds $20 to his savings account each week. Which expression represents the amount of money Cody has in his savings account after x weeks

• 450x + 20

• 450 + 20x

• 470 + x

• 470x

Sarah has 6 more than 3 times as many strawberries as Juan.

What expression that matches the situation?

• 6 + 3x

• 3x

• 6 + 3

Bob walked y miles yesterday, and 1.25 miles fewer today.

• 1.25 -y

• y - 1.25

• y + 1.25

• 1.25y

Alex sells corn at the farmer's market.  If c represents the amount of corn Alex has, which number sentence could be used to find the amount of corn Alex has left after selling 7 ears of corn? 

• c - 7 = ? 

• c + 7 = ? 

• c x 7 = ? 

• 7 - c = ? 

Write an expression to represent the age of a person five years older than you.

• y + 5

• 5 - y

• y ÷ 5

• y - 5

Pick the thing that we could use as a Variable

• 12

• 8

• 1

• k

The number of inches of rain that fell this week is the same as the number of inches of rain that fell last week.​

Which symbol describes the situation?​

• =

  is equal to

• <

  is less than

• ≤

  is less than or equal to

• >

  is greater than

• ≥

  is greater than or equal to

Susannah baked 25 brownies. She gave away b brownies Which equation shows the number of brownies she has left?

• 25 - b = ?

• 25 + b = ?

• b - 25 = ?

• 25b = ?

At a talent show, each performer has 2 minutes to set up, 3 minutes for an introduction, and 5 minutes for the act. There are 20 people performing. Which expression would help you find how long the talent show will be?

• 2(20 + 3 + 5)

• 3(20 + 2 + 5)

• 5(20 + 2 + 3)

• 20(2 + 3 + 5)

To find a discount of 30% off of a price of P, which expression should you use?

• 30P

• 0.30P

• 0.70P

• 1.70P