Ursula
What is a coefficient?
Give an example.
The number in front of a variable. 3x (3)
Simplify: 4x + 18 - 9x - 5
-5x + 13
Solve: x + 8 = 19
x = 11
Solve: 2x - 9 = 11
x = 10
Write the expression:
Lucas started with some books. He is going to purchase 10 more books this weekend. How many books does he have in all?
x + 10
What is an expression?
Give an example
A mathematical statement with no equal sign.
Simplify: 4 - (x - 9) - 5x
4 - x + 9 - 5x
-6x + 13
Solve: -5x = 60
x = -12
Solve: x/2 - 7 = -1
x = 12
Write the expression:
Cinderella is going shopping for new shoes. Each shoe costs $27.50. She bought x number of shoes. How much did she spend in all?
27.50x
What is perimeter?
Give an example.
The distance around a shape.
Simplify: 1/2x + 9 - 1/5x - 11
3/10x - 2
Solve: 4 + x = -4
x = -8
Solve: x/8 + 4 = 2
x = -16
Write the expression:
Beast is buying flowers. He buys some flowers. They cost $2.25 per flower. How much did he spend?
$2.25x
What is a variable?
Give an example.
A number we don't know or an unknown amount
Simplify: 4 + 3(x - 10)
4 + 3x - 30
3x - 26
Solve: x/8 = -2
x = -16
Solve: 2 - 4x = 22
x = -5
Write the expression:
Alice is making cookies. She needs 2 1/2 cups of flour per batch of cookies. She makes an x number of batches. How much flour does she need?
2 1/2x
What is an equation?
Give an example.
A mathematical statement with an equal sign.
8x = 64
Simplify: 1/3(6x - 18)
2x - 6
Solve: 2/3x = 8
x = 12
Solve: 38 = 3 - 5x
x = -7
Write the expression:
Tigger is reading "The Hunger Games". He has already read 80 pages. He finishes the book in 3 days. He reads x number of pages each day. How much does he need to read every day?
3x + 80