13 is C, √10
Rational numbers are numbers that can be expressed as a ratio, or a fraction.
14 is C, 9.5 × 10^5
The domain of the function is the union of all of the "if" parts of the function definition:
... (-∞, -1) ∪ [-1, 1] ∪ (1, ∞) = (-∞, ∞)
As a mixed number it’s 7 6/9 -not too sure about improper fraction. just know that repeating decimals always have a 9 as the denominator -hope that helps :)
we are given
You can buy a 6 hour phone card for $5
so, total hours = 6 hours
now, we can change it into min
6 hours = 6*60 min

Let's assume
x is the number of actual minutes talked,
y is the called number of minutes left on the card
and we are given
each minute you talk actually costs you 1.5 minutes of time
so, we get equation as

Graph:
Answer:
84 CDs last week and 26 CDs this week
Step-by-step explanation: