Andy was buying $5 hats and $3 gloves for every person on his Christmas list. He also bought one roll of wrapping paper for $2. Let x represent the number of people on his Christmas list.
x(5+3) + 2
or
5x + 3x + 2
What is the variable in the expression
2x + 4
x
Kelly was buying lunches for her friends. Sandwiches are $3 each and chips are $2. Let x represent the number of lunches that she buys.
3x + 2x
What is the constant in the expression
2x + 4
Karley was taking a test where every question was worth 5 points. She missed 2 points on every question. Let x represent the number of questions on the test.
5x - 2x
What is the coefficient in the expression
2x + 4
2
Alex is collecting read-a-thon donations to benefit the library. He has $5 already. he has 2 sponsors that pledged a $4 donation plus $2 for each book he reads. Let x represent the number of books Alex reads.
5 + 2(2x + 4)
2/3 x
a number multiplied by two thirds
What are the terms in the expression
2x + 4
2x and 4
5 teachers each ask students to buy 3 pencils and 4 pens. Let x be the cost of a pencil and y be the cost of a pen.
5(3x + 4y)
20x - 5x
the difference of twenty times a number and 5 times a number
What is the difference between an expression and an equation?
the = sign