Parts of An Expression
What is an example of a variable?
Simplify: 3x + 2x
5x
What do we use when we're trying to UNDO an operation? Looking for a vocab word.
INVERSE operations
I buy strawberries for $2.50 a pound. How much money will I spend if I buy 0 pounds of strawberries?
$0
What is my order of operations?
Parentheses, Exponents, Multiply/Divide, Add/Subtract
What is the difference between an expression and an equation?
An equation has an equal sign, an expression does not
Simplify: 5y + 3 - 2y
3y + 3
What operation am I doing in this expression?
5t
I'm doing 5*t, so I'm MULTIPLYING (since I don't see another operation)
List 1 of the things that makes something a proportional relationship (if you get all 3 I'll give you double points!)
Goes through (0,0)
Follows a rule
Straight Line
NO CALCULATOR
10 + 3(2)
16
In the expression 3x + 2, what is the coefficient?
3
Simplify: 2x + 3y + 2
Trick Question! This is already simplified.
2x + 3y + 2
Solve for n:
5 = n - 3
n = 8
You mow lawns for a day and make $100. If you mowed 5 lawns, how much are you charging per lawn?
$20
2 + 4(8-5)
14
What is the constant in the expression 4 + 2y?
4
Simplify: 2x + 5x2 - x2 + 1
4x2+2x+1
Solve for y:
y/8 = 10
y = 80
Ms. Stewart is going to write a table on the board. Find the unit rate and write it in. ___x = y form.
7x=y
18 - 3(2+4)
0
What is the value of x in the expression 2x + 3?
Trick Question! We don't know, and we don't care, because it's an expression not an equation.
How many terms will this expression have when fully simplified?
3w + 4x2 - w + 6 - 2w + x2
There will be 2 terms left!
3w - w - 2w is 0
4x2+x2 is 5x2
There's nothing to combine with 6, so our simplified expression is:
5x2 + 6
Solve for z:
2z+1 = 15
z = 7
You are bought 3 concert tickets for $45. How much would it cost you to buy 7 concert tickets?
45/3=15 per ticket
15*7=$105
2(6-3)/3 (I'll rewrite this on the board so it looks better)
2