Vocabulary
The number that is multiplied by a variable in an algebraic expression.
(the "3" in 3m)
What is a coefficient?
This expression represents "ten less than 3 times a number"
What is 3n-10 ?
This is the number line representation of the inequality c > 125.
What is an open circle above 125, with an arrow pointing to the right
This is the first step in solving for the value of m in:
3m = 42
What is dividing both sides by 3 ?
A number in an expression that has a fixed value and does not change.
What is a constant?
This equation represents the total cost of going skating, if skates must be rented for $3.50. In addition, it costs $2.25 per hour to skate.
Use C to represent the total cost, and H to represent the number of hours
What is
C = 2.25H+3.50
Allie went to the fair and discovered she must be at least 60 inches to ride the fun rides. This inequality represents that situation.
What is h >= 60 ?
This is the first step in solving for x in:
x - 12 = 37
What is adding 12 to both sides?
A symbol, usually a letter, that represents an unknown number or a value from a specified set.
What is a variable?
This expression is equivalent to:
m*m + 32 + n
What is
m2 + n + 9 ?
This is the inequality AND graph (number line) represented by the situation:
"Students can only miss 3 or fewer days to meet the attendance incentive."
What is:
days <= 3
closed circle above 3, pointing to the left ?
This expression is equivalent to
2(2a2 - 4a + 3) + 3a2 - 4a + 7
What is 7a2 - 12a + 13 ?
A mathematical sentence that shows two expressions are equal, containing an equals sign.
What is an equation?
After combining like terms, this expression is equivalent to:
3a + 15 - 2a2 + 5a2 - 7 + 5a
What is
3a2 + 8a + 8 ?
This is the inequality represented by the graph:
- open circle above 4.5
- arrow pointing to the left
What is x < 4.5 ?
This is the value for x, if:
(3/4)x = 12
What is x = 16?
Two or more expressions that have the same value, regardless of the value of the variable.
What are equivalent expressions?
The formula for the perimeter of a rectangle is P = 2l +2w, where l is the length and w is the width. If a rectangle has a length of 8 inches and a width of 5 inches, this is its perimeter.
What is 26 inches?
An inequality is a ____ between two quantities. Inequalities have ____ solutions.
(must get both!)
What is comparison; infinite.
This is the value for x, if:
20 + 4x = 50
What is x = 7.5 ?