Modeling With Expressions

Identify the variable in the expression 5y+7?

• x

• 5y

• y

• 7

Identify the factors in the following expression:

5 + 6a + 11b

Write an expression showing the total cost for the following:

Erin is buying produce at a store. She buys c cucumbers for $1 and a apples for $1.50

• 1c + 1.50a

• 1 + 1.50

• 1a + 1.50c

Samantha has 3 more than 4 times as many books as Deanna. If Deanna has d books, how many books does Samantha have?

• 3d + 4

• 3d - 4

• 4d + 3

• 4d - 3

Sally is selling bracelets for $5 and necklaces for $10.  If the equation below represents her total revenue (R), what the is the meaning of '10y'?
R = 5x + 10y

• Number of bracelets sold

• Number of necklaces sold

• Money earned from bracelets

• Money earned from necklaces

Paul is making money during the summer by selling lemonade.  He buys all of the supplies for $20 and sells each cup for $0.50.  What does the expression below represent?
0.50x - 20 

• Number of cups of lemonade sold

• Total money from cups of lemonade sold

• Total profit made from lemonade

• Money spent on supplies

How many terms are in the expression
3x + 2y + z

• 5

• 2

• 4

• 3

How many terms are in the expression
3a + 2b + c + 100

• 3

• 4

• 5

• 6

Identify the coefficients in the following expression:

8x + (-20y) -10

Which is an algebraic expression for "six less than k".

• 6/k

• k/6

• 6 - k

• k - 6