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Online notes for Math 15, Math for Liberal Arts taught in the Fall 2016 semester at Laney College by Prof. Hubbard.
Special posts
Blog Archive
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2011
(41)
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July
(13)
- Practice problems with complex numbers a + bi
- Two 4x4 sudoku problems
- Link to degrees of freedom problems with contingen...
- Pictures and posts about tilings of the plane.
- Link to the five British Logicians post.
- Link to set theory practice
- Tautology practice for Summer 2011.
- Practice for binary, decimal and hexadecimal repre...
- Practice for the quiz on Thursday 7/14: polygons a...
- Practice with angles of triangles and classification
- Links to the stories about the computer scientists.
- The triangle inequality, Heron's formula and the t...
- Practice with square roots for homework due July 6.
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July
(13)
About Me
Labels
- 1 is a unit and not prime
- 100 coins
- all factors
- angles and sides
- area of a triangle
- binary
- biographies
- bitwise operators
- classification of three vertex triangle
- classification of triangles
- coin problems
- composite numbers
- compound interest
- computer science
- conditional probability
- Consumer Price Index
- contingency tables
- corrections
- decibel and bel scale
- decimal
- Decimal time notes
- decimals
- determinants
- distance
- divisibility
- effective interest rates
- Finding the square root of any number
- five number summary
- Fractional part of a day
- fractions
- geometry
- half life
- Heron's formula
- hexadecimal
- homework answers
- Important class dates Fall 2016
- inclusion-exclusion rule
- interest and loans
- Kramer's rule
- linear equations
- logarithms
- logic
- Math history.
- metric system
- numbers and representation
- old school
- order of operations
- outliers
- overflow
- percents
- Polish notation
- powers of 10
- practice
- practice problems
- prime factorization
- prime numbers
- probability
- probability based on contingency tables
- Pythagorean theorem
- regular polygons
- repeating decimals and fractions
- Richter scale
- Roman numerals
- rounding
- scales based on powers of 10
- scientific notation
- scientific notation notes
- set theory
- significant digits
- simultaneous equations
- slope
- square roots
- statistics
- syllabus
- three dimensional geometry
- tilings of the plane
- time
- triangle inequality
- truth tables.
- underflow
- Venn diagrams
- weights and measures
- z-scores
1 comment:
a] (4 + i) + (7 - i)
Answer: 11
b] (4 + i) - (7 - i)
Answer: -3 + 2i
c] (7 - i) - (4 + i)
Answer: 3 - 2i
d] (4 + i) * (7 - i)
FOIL: 28 - 4i + 7i - i^2 =
28 - 4i + 7i + 1 =
Answer: 29 + 3i
e] (4 + i) / (7 - i)
Multiply by (7 + i)/(7 + i)
Numerator FOIL = 28 + 4i + 7i + i^2 =
28 + 4i + 7i - 1 =
27 + 11i
Denominator FOIL =
49 + 7i - 7i - i^2 =
49 + 7i - 7i + 1=
50
Answer: 27/50 + 11i/50
f] (7 - i) / (4 + i)
Multiply by (4 - i)/(4 - i)
Numerator FOIL = 28 - 7i - 4i + i^2 =
28 - 7i - 4i - 1 =
27 - 11i
Denominator FOIL =
16 - 4i + 4i - i^2 =
16 + 7i - 7i + 1=
17
Answer: 27/17 - 11i/17
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