Question

the concession stand sells snacks on friday and saturday. the amount of money earned on saturday is double the amount of money earned on friday.
a. define the variable in this situation.
b. write an expression to represent the amount of money the concession stand earns on saturday.
mrs. chan has 50 blocks to divide among her students.
a. define the variable in this situation.
b. write an expression to represent the number of blocks each student gets.

Explanation:

Step1: Define variable (concession stand)

Let $x$ = money earned on Friday (in dollars).

Step2: Write Saturday earnings expression

Saturday earnings = 2 × Friday earnings
$2x$

Step3: Define variable (blocks)

Let $n$ = number of students.

Step4: Write per-student blocks expression

Blocks per student = total blocks / number of students
$\frac{50}{n}$

Answer:

Concession Stand Problem

a. Let $x$ represent the amount of money (in dollars) earned by the concession stand on Friday.
b. $2x$

Mrs. Chan's Blocks Problem

a. Let $n$ represent the number of students Mrs. Chan has.
b. $\frac{50}{n}$