Vocabulary
What is the name of the letters that represent unknown quantities?
A variable
x + 2 = 3
x = 1
2x + 1 = 7
x = 3
2x + 5 = -3x
x = -1
There are 7 basketballs, 9 baseballs, and 4 tennis balls.
What is the name of a fixed quantity that does not change?
A constant
5 - x = 1
x = 4
16 - 3x = 4
x = 4
3x = 5x + 24
x = -12
Jill has 10 candies in her pocket. x - 2 of them are green and x of them are red. How many of each colour does she have?
6 are red and 4 are green
What is the number called that's placed directly in front of a variable?
A coefficient
2x = 6
x = 3
x/4 + 5 = 11
x = 24
4x + 1 = 4 + x
x = 1
Taylor is five times as old as Spenser. The sum of their ages is eighteen. How old are Taylor and Spencer?
Spenser is 3 years old and Taylor is 15 years old
2a, 47a, 1/2 a.. are all examples of ____ terms.
Like
x/3 = 3
x = 9
22 - 3x = 7
x = 5
22 + 5x = 6 - 3x
x = -2
A father is three times as old as her daughter. Six years ago, the father’s age was six tines that of her daughter. How old are they now?
the daughter’s is 10 years old and the father is 30 years old
_____ is made up of two or more terms.
An expression
4 + x = 3 - 7
x = -8
24/x - 5 = 7
x = 2
3x + 4x + 2 = 9x - 12
x = 7
A coin collection amounting to $25 consists of nickels and dimes. There are 3 times as many nickels and dimes. There are 3 times as many nickels as dimes. How many coins of each kind are there?
100 dimes and 300 nickels