Vocabulary
What is the difference between an equation and an expression?
an equation can be solved/has an equal sign
2x + 2x
4x
5(m+9)
5m + 45
6x = 102
x = 17
Write an expression for the verbal phrase:
2 greater than a number
x + 2
What are like terms
terms that are alike that we can combine
p + 2 + 10p
11p + 2
4(n-1)
4n - 4
a + 12 = 24
a = 12
Write an expression for the verbal phrase:
a number decreased by 10
x - 10
What is a coefficient? Give an example.
The number next to or being multiplied to a variable
x + 6x
7x
8(n+6)
8n + 48
16 = r/16
r = 256
Write an expression for the following verbal phrase:
3 times a number increased by 7
3x + 7
What is a variable? Give an example.
A letter that stands for an unknown value
3n + 10 + 8 + n
4n + 18
5(1 + 2x)
5 + 10x
n-2 = 1
n = 3
Solve the following problem: Miss Robertson made $350 at her lemonade stand and wanted to split it between her four friends. How much money did she and her friends each get?
$70
What are inverse operations? Give two examples.
The opposite operation used to solve an equation
10 + 8r - 5r - 2
3r + 8
6(1 + 10b)
6 + 60b
31 = k+15
k = 16
Solve the following problem: Miss Robertson bought 11 packs of pencils that had 20 pencils in each pack. How many pencils are there total?
220 pencils