Exponents & Scientific Notation
PEMDAS & Operations of Algebraic Expressions
Linear Equations
Systems of Linear Equations
Statistics (mean, median, mode, etc)
100
a) 25
b) 33
c) 2-2
a) 32
b) 27
c) 1/4
100
What does PEMDAS stand for?
Parentheses, Exponent, Multiplication, Division, Addition, Subtraction
Please Excuse My Dear Aunt Sally
100
x+4=21
x=17
100
x - 3y = -22 4x + 2y = -4
(-4,6)
100
How do you calculate mean?
Add all the numbers in a data set and divide by the number of numbers
200
24+(32-22)
21
200
(2+4)2-(33)+27-9
27
200
2(x+7)=20
x=3
200
x - 7y = -11 5x + 2y = -18
(-4,1)
200
14, 18, 23, 2, 7
What is the median?
14
300
0.0002077
300
What is x?
The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown".
300
2x+15-x=30
x=15
300
−2x+10y=2 5x−25y=3
no solution
300
2, 5, 12, 78, 34, 56
Find the range.
76
400
0.0000345 - Convert to scientific notation.
3.45x10-5
400
9x+3y+4x+2y
13x+5y
400
2(x+4)+4(x+1)=0
x=-1
400
6x−5y=8 −12x+2y=0
(-1/3, -2)
400
17, 16, 2, 27, 32, 4
Find the mean. Round to 2 decimal places.
16.33
500
2431/5
3
500
5(2x3+5x2-8)-3(4x2+5x-2)
10x3+13x2-15x-34
500
23(x-1)+(2x+7)=69
x=7
500
7x−8y=−12 −4x+2y=3
(0, 3/2)
500
Find the mean, median and mode of this data set: 3, 61, 92, 24, 17.
Answer: Mean: 39.4, Median: 24, Mode: None