Vocabulary
In algebra, what are the letters called that represent an unknown quantity?
Pronumeral/variable
8a + 15a + a + 9
24a + 9
21b - 6b
15b
-7w - 5 + 17w + 15
10w + 10
7x + 7
Not Like
What do you call something in algebra that contains a mix of numbers and letters that are separated by math operators like +, - or x.
E.g. 2x + 5zy - 7
Expression
5x + 35 + 4x + 7
9x + 42
12c - 6c - 30
6c - 30
19a - 6b - 17a - 3b + 9b - 2a
0
3x - 4x + x
Like
What are 2 other words that are used to describe "adding" or "multiplying"?
Sum and Product
32 + 12t + 16t + 8
28t + 40
5z - 55 - 26 - z
4z - 81
-2f - 1f + 6 + 5f
2f + 6
4x + 7xy + x2
Not Like
What is the number in front of a letter called?
Coefficient
75f + f + f + f2
77f + f2
-7d - 40 + 8d
d - 40
5r + 3q - 8q + r
6r - 5q
5x2 + 2x
Not Like
What is it called when you replace a letter with a number to do an algebraic calculation?
Substitution
m2 + 9m2 + m + 10m
10m2 + 11m
-15j - 18k - 20j - 18k
-35j - 36k
53t + 20r + 17 - 10t
20r + 43t + 17
10xy2 - 5xy2 + xy2
Like