Vocabulary
addition, subtraction, multiplication, and division signs are examples of what in expression and equations?
Operators
-3x + 11x + x
9x
9 (-4y + 5)
-36y + 45
x + 12 = -4
x = -16
3x + 8 = 17
x = 3
What is the letter in your math expressions or equations called?
Variable
15 + 9x +2x - 7
11x + 8
-1/3 (6m - 15)
-2m + 5
y + (-9) = 7
y = 16
7x - 24 = 39
x = 9
These have the same variable and same exponent in and expression or equation.
Like Terms
2.5x - 8 - 1.7x
-32.5c - 75
-4m = 28
m = -7
-x/2 - 11 = 1
x = -24
The number in front of a variable is called what?
Coefficient
4/8x + 3x - 3/8x
3 and 1/8
How will these two answers be different?
-4 ( 2x - 3) and -4 (2x + 3)
The second operator will be negative in the second answer.
x/7 = 14
x = 98
15 = 5 - m
m = -10
What are separated by operators in an equation or expression?
Terms
What two things are connected in expressions when you are rearranging them?
The operator and the term behind it.
at a candy shop, a group of three friends each bought a lollipop (p), two candy bracelets (b), and three gummy worms (g). Write an expression to represent the items bought AND simplify the expression.
3 ( p + 2b + 3g)
3p + 6b + 9g
-4/7 x = 12
x = -21
12 = 15 - 1/4 x
x = 12