Vocab
What is the multiplier placed before a variable?
example: the #9 in the expression
9x + 3
coefficient
Solve:
5 - 3 * 2
-1
x - 7 = 93
x = 100
≅
Congruent
(Equal)
Solve:
5(12)
60
An angle that measure between 0 and 90 degrees
Acute
Solve:
3(5+2)
21
(x+5)/6 = 10
x = 55
⊥
Perpendicular
(forms a right angle)
Solve:
2(11 + 3)
28
Angles that add together into 180 degrees
Supplementary angles
Solve:
2+5(4) -15
7
5x + 8= 53
x = 9
π
pi
3.14159265359
Solve:
(3+8)(9-2)
77
A letter that always represents an unknown number, or what you’re solving for in an algebra problem.
Variable
Solve:
8 - 75 / 5 ^ 2
5
29 = 3x - 2^2
x = 11
≥
example: x ≥ −2
Greater than or equal to
Solve:
(x + 3)(x + 6)
x^2 + 9x + 18
An algebraic expression containing two terms
example: 9x + 17
Solve:
(27 / 3^2) +2
5
33 = x^2 - (48/3)
x = -7, 7
!
example: 5!
factorial
-> The product of a number and all the numbers below it
example: 5! = 5 * 4 * 3 * 2 * 1
Solve:
(x - 10)(x - 4)
x^2 - 14x + 40