unit 3 vocab
what is a variable?
A variable is a letter in math that represents a unknown number
what is is the GCF of 12 and 24
the GCF is 12
what is Percent error?
how far off a guest measurement or estimate is from the actual value expressed as a percentage of that actual value
A diagram consisting of a sequence of nodes and branches that show the amount of possible outcomes.
What is a tree diagram?
Picking a marble from a jar, replacing it, and picking another one
Independent event
what is a trinomial?
a trinomial is a polynomial consisting of exactly 3 terms
distribute 2(5x+10)
10x+20
how to do the 10% of short cut?
by moving the decimal point one place to the left
A number that represents the likelihood that an outcome will occur
What is probability?
When tossing a coin what is the probability of heads or tails.
2/2 or 1
what is a coefficent?
A number attached to a variable
3x + 7y + 6
How do you do convert percents to decimals?
divide the percentage by 100 to get the decimal write the decimal.
Using data from a sample to draw conclusions about a population
What is an inference?
If the probability that it will not snow tomorrow is 0.85% what is the probability that it will?
99.15%
what is definition of GCF
Greatest common factor
if the length is 8 and the width is 9 what is the area
the area is 72 square units
what is Percent change?
calculates how much a value has increased or decreased relative to its original amount
Number of observed occurrences of the event
What is outcomes?
Create a sample space representing all possible outcomes of flipping a coin.
H T
H T TH
What does it mean to translate expressions?
Turning an English sentence into a mathematical sentence.
Translate & Solve:
Twice a number increased by 7 is 21.
2x +7=21
x= 7
What is 20% of 60
Hint: Is/Of
33.33 or 1/3
An event consisting of more than one outcome from the sample space of a choice
What is a compound event?
Why can't -0.59 be considered a probability of an outcome.
In order for something to be impossible it has to be 0 nothing is less likely than impossible