Vocabulary Vault
A letter used to represent one or more numbers
What is a variable?
Evaluate 7y when y = 3
What is 21?
Evaluate 3 + 4 · 2
What is 11?
Is x = 3 a solution of the equation x + 4 = 7?
What is yes, because 3 + 4 = 7?
This type of graph is especially useful for showing changes in data over time
What is a line graph?
In the power 5³, the 5 is called this and the 3 is called this.
What are the base and the exponent?
Write 4 · 4 · 4 · 4 · 4 in exponential form
What is 4⁵?
Evaluate 24 − 8 − 6
What is 10?
Use mental math to solve 4h = 32
What is h = 8?
You save $5.00 a week to buy a CD that costs $15.00. How many weeks must you save?
What is 3 weeks? (5w = 15, so w = 3)
This rule says that when operations have the same priority, you do them in order from left to right
What is the left-to-right rule?
Use d = rt to find how far a car travels at 60 miles per hour for 3 hours
What is 180 miles?
Evaluate 6 + 2² − (7 − 5)
What is 8? (6 + 4 − 2)
Write as an equation, letting x be the number: “The difference of 15 and a number is 8.”
What is 15 − x = 8?
For the function C = 5n + 10, find the output C when the input n is 3
What is 25?
The collection of all input values of a function is called this, and the collection of all output values is called this
What are the domain and the range?
Evaluate 2x³ when x = 4
What is 128? (2 · 64)
Evaluate 550 − 4(3 + 5)²
What is 294? (550 − 4 · 64 = 550 − 256)
Is x = 4 a solution of the inequality 7x − 5 > 20?
What is yes, because 7(4) − 5 = 23 and 23 > 20?
For C = 5n + 10, the inputs are n = 1, 2, 3, and 4. What is the range of the function?
What are 15, 20, 25, and 30?
When you model a problem, you first write this kind of model using words, then translate it into this kind of model using symbols
What are a verbal model and an algebraic model?
Evaluate (10 − b)³ when b = 3
What is 343? (7³ = 7 · 7 · 7)
Evaluate (15 − 6) ÷ (6 + 3² − 12)
What is 3? (9 ÷ 3)
A long distance call costs $.20 per minute and the total cost is $6.00. Write an equation and solve it to find the length of the call.
What is 0.20x = 6.00, so x = 30 minutes?
Does a table with the (input, output) pairs (1, 3), (2, 4), and (2, 5) represent a function?
What is no, because the input 2 has two different outputs?