Vocabulary
A letter used to represented a number (x, y, z...)
Variable
12x - 8x
4x
-3(x + 4)
-3x - 12
If x = -2 and y = 4, evaluate...
x + y
2
8 + 4y - 2 - 11y + 7x
How many terms are there?
5
8 + 4y - 2 - 11y + 7x
What are the consants?
8, -2
-17y - 8y
-25y
7(x - 10)
7x - 70
If m = -3 and n = 5, evaluate...
2m + n
-1
It cost $15 to get into the park and $0.25 for each ride. How much would it cost to go on 15 rides at the park?
$18.75
A number in front of (multiplied by) a variable. For example, -5x, what is the -5?
Coefficient
-19p - 10 + 5
-19p - 5
5(2x - 9)
10x - 45
If c = -5 and d = 1, evaluate...
3(2c + 2d)
-24
8 + 4y - 2 - 11y + 7x
What are the coefficients?
4, -11, 7
A term without a variable
Constant
6.8x + 4 + 9x - 1.1
15.8x +2.9
6(2/3x - 12)
4x - 72
If q = 5, r = -1, and s = 3, evaluate...
2q + 3r - s
4
Find the total of (3/8y -8) and (2 1/2y +12)
2 7/8y+4
Parts of an expression separated by a plus or minus sign
Terms
2/3x + 8y - y + 16 + 3 4/5x
4 7/12x + 7y + 16
-7(-3x + 2y + 4)
21x - 14y - 28
If g = -4, h = 9, evaluate...
2g - 3h + 7h - 5g
48
Factor the expression -12b+6c+18 using the GCF.
6(-2b+c+3)