Equations (one side)
2x + 3 = 9
x=3
3x > 9
x>3
-4x < 12
x>-3
When is the circle filled in for inequalities
When the problem states less than or equal to or greater than or equal to (look for the underlined < or >)
Simplify: 5(x - 2)
5x - 10
3a - 4 = 8
a=4
-4a + 2 < 14
a > -3
18 < -3x
-6>x
When do you not fill in the circle on the number line for inequalities
For < or >
Write the equation and solve for the variable:
23 less than the number, x, is 87
x = 110
2x + 9 = 27
x = 9
7(-x + 2) < 70
x > -8
-2x + 4 < 14
x>-5
What is the first step when solving 2 step inequalities or 2 step equations
Undo the addition or subtraction
Write the equation and solve for the variable:
8 times a number, h, is 96.
8h = 96
x = 12
4x + 6x - 13 = -83
x= -7
x < 11
-7x + 3 < -18
x>3
What is the second step when solving 2 step inequalities or 2 step equations
Multiply or Divide
Nick earns $30 for every pair of shoes he sells. He uses the expression 30x to calculate his earnings, in dollars.
What is the meaning of the variable, x, in the expression 30x?
x = pair of shoes that he sells
3.5(x - 2.1) = 10.15
x=5
-3 (r - 4) > 0
r < 4
2x + 3 - 4x < -17
x>10
When do you flip the inequality sign?
When you multiply both sides by a negative number or when you divide by a negative number on both sides.
How do you spell Mrs. G's last name?
Garofalo