Equations
x/10 = 10
x = 100
Is there a proportional relationship between goals and fouls?
8 goals: 21 fouls
22 goals: 46 fouls
No
This measure of central tendency is the most frequent value in a data set
mode
3x + 1 - 3x
1
This property states that you can rearrange numbers when adding or multiplying without changing the value
commutative
3n + 1 = 7
n = 2
6/9 = 4/h
h=6
Ryann calculates her grade by adding the values of all assignments and dividing that by the number of assignments. What measure of central tendency is she using?
mean (average)
-6 - 3x - 4
-3x - 10
To add and subtract fractions, you must find a _________ ____________.
denominator
-4 + 2s = 8
s = 6
Darnell's baseball team always does warm-ups before a game. Before last week's game, Darnell did 50 knee lifts in 2 minutes. Today, he will do knee lifts for 3 minutes. If he does them at the same rate, how many knee lifts will Darnell do today?
75 knee lifts
What step must happen first in order to find the median of a data set?
Order the values from least to greatest
-6c + 4c + 25 + 2c - 5
20
What is the multiplicative inverse of -3?
-1/3
20 = 4(s − 11)
s = 16
819 out of the 975 runners in a marathon were women. What percentage of the runners were women?
84%
If there are an even number of numbers in a data set, how do you find the median?
Find the middle between the middle two values!
3(4x - 4)
12x - 12
What is the stem in a stem-and-leaf plot?
The first digits in a number (hundreds, tens, etc.)
-6x + 2(-7x + 6) = 112
x = -5
Omar is monitoring the population of red kangaroos in the deserts of Australia. Omar catches 141 red kangaroos, tags them, and releases them. A little while later, a helicopter pilot takes an aerial photograph of 460 red kangaroos, 47 of which are marked. To the nearest whole number, what is the best estimate for the red kangaroo population?
1,380 red kangaroos
This measure is NOT a measure of central tendency but rather a measure of deviation
range
-4(9x - 4) + 2x - 5
-34x + 11
To find the probability of multiple events in a row, you should ____________ the probabilities of each individual event.
multiply