Introduction to Expressions and Equations

A basketball team uses the expression 1x + 2y + 3z to show how many points they earned. Let x represent the number of one-pointers, y the number of two-pointers, and z the number of three-pointers. How many points did a team that made 7 one-pointers, 4 two-pointers, and 3 three-pointers earn? 7

• 24 points

• 6 points

• 74 points

A store uses the expression 1.25c + 1.50s to calculate their profit for selling C number of chips and S number of sodas. If the store sold 125 chips and 113 sodas, what is their profit? 156.25 + 169.5

• $3,125

• $325.75

• $74

Is the following equation true, false, or open: 144/12 = 12 x 1

• True

• False

• Open

Is the ordered pair (6,12) a solution to the equation 2x = y

• Yes

• No

A mathematical sentence stating that two expressions are equal

• variable

• expression

• equation

• term

A letter used to represent a number value in an expression or an equation

• term

• coefficient

• constant

• variable

A part of a mathematical expression separated by addition or subtraction symbols

• constant

• term

• equation

• variable

5y = 7 is an example of an ____________

• expression

• equation

5y - 7 is an example of an ____________

• expression

• equation

In 8r - 3 , the COEFFICIENT is ___

• 8

• r

• -

• 3