3x = 33
x = 11
5(x + 3)
5x + 15
5(x + 14) = 100
x = 6
How would you write 0.8888 as a fraction?
What is 8/9
Expression
has numbers and/or variables but NO equal sign
12x = 144
x = 12
7( x + 9)
7x + 63
2(13x + 3) = 58
x = 2
Write this number in standard form:
1.24 x 104
What is 12400
Equation
Has an equal sign
x/5 = 8
x = 40
4( 2x + 7)
8x + 28
4(x + 11) = 56
x = 3
What is this number in scientific notation?
456,000
What is 4.56 x 105
Coefficient
the number in front of the variable
x - 11 = 44
x = 55
9( 2 - x)
18 - 9x
6(6x - 11) = 6
x = 2
Exponent rules...
63 x 69
What is 612
Constant
Number
x + 100 = 123
x = 23
6(x - 9)
6x - 54
3( x + 12) = 72
x = 12
Which number is irrational?
-45 0.5555 0.456857...
What is 0.456857...
Variable
represents a number