Complex Arithmetic
i2 =
i3 =
i4 =
i2 = -1
i3 = -i
i4 = 1
If b2 - 4ac = 0, how many solutions does a quadratic equation have?
If b2 - 4ac = 0, how many solutions does a quadratic equation have? 1
Max - Min = _______
Q3 - Q1 = _______
Max - Min = Range
Q3 - Q1 = IQR
Name every foreign teacher (for middle/high school) in this school, including both this year and last year's teachers.
Name every foreign teacher (for middle/high school) in this school, including both this year and last year's teachers.
Patrick, Fred, JR, John, Farz, Erik, Paul.
(2i + 2)(2i - 2) =
(2i + 2)(2i - 2) = -8
x2 + x + 4 = 0
x2 + x + 4 = 0
x = -1/2 +/- i(sqrt15) / 2
What are the numbers in a 5-number summary?
What are the numbers in a 5-number summary?
Min, Q1, Median, Q3, Max
How many meters high is the peak of Mount Everest? (3 guesses, must be within 500m to get points)
How many meters high is the peak of Mount Everest? (3 guesses, must be within 200m to get points)
8,848.9 m
3i(4i + 5) =
3i(4i + 5) = -12 + 15i
x2 + 3x + 4 = 0
x2 + 3x + 4 = 0
x = -3/2 +/- i(sqrt7)/2
If mean > median, it means the shape of the data is ______
If median > mean, the shape is ______
If mean > median, it means the shape of the data is right-skewed
If median > mean, the shape is left-skewed
a2 + b2 = c2
What is the English name for this formula?
a2 + b2 = c2
What is the English name for this formula?
Pythagorean Theorem
(or Pythagorean Formula)
(4i2 - 3)(i + 2)
(4i2 - 3)(i + 2) = -14 - 7i
2x2 + 2x + 2 = 0
2x2 + 2x + 2 = 0
x = -1/2 +/- i(sqrt3)/2
Give one advantage of using median instead of mean to measure the center of data.
Give one advantage of using mean instead of median to measure the center of data.
Give one advantage of using median instead of mean to measure the center of data.
not affected by outliers
Give one advantage of using mean instead of median to measure the center of data.
more precise
As of today, how old is the oldest living person in the world? (3 guesses, must be within 3 years to get points)
As of today, how old is the oldest living person in the world? (3 guesses, must be within 3 years to get points)
115 years, 278 days (from the UK)
(i + 3)(i - 2)(3i + 4) =
(i + 3)(i - 2)(3i + 4) = -31 - 17i
-3x2 - 5x - 5 = 0
-3x2 - 5x - 5 = 0
x = -5/6 +/- i(sqrt35)/6
[30, 32, 33, 35, 36, 38, 41]
a) If we added a new number, how big would it have to be to be an outlier?
b) If we added a new number, how small would it have to be to be an outlier?
(round answers to nearest integer)
[30, 32, 33, 35, 36, 38, 41]
a) If we added a new number, how big would it have to be to be an outlier? greater than 50
b) If we added a new number, how small would it have to be to be an outlier? less than 22