Day 1 Algebra Concepts Intro & 1.1...
Transcript of Day 1 Algebra Concepts Intro & 1.1...
Day 1 Algebra Concepts Intro & 1.1 Notes
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September 08, 2016
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Ms. EngbrechtAlgebra Concepts
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About Me
Day 1 Algebra Concepts Intro & 1.1 Notes
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BE HEREWORK HARDBE NICE
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Syllabus&
Hall Passes
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No food or beverage (except water)
No electronics except your calculator
(No Phone, iPod, iPad, etc.)
Be on time (In your seat when bell rings)
Have a good attitude
Follow the rules set forth by the school
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GRADES50% tests
30% quizzes
20% assignments
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Expect it daily
Typically due at the Beginning of next class
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Testing Procedure Review Day
Test Day
Outside of class Retake if you have all assignments done
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Rules Continued... passes (only during work time)
end of the hour (stay in your seat)
sharpening pencils (do it before class or during work time)
be prepared (notes in binder, book, pencils, paper)
NO PHONE
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Every Day You Will NEED...• Pencils• Paper• Binder (your notes)• Textbook• Calculator• Planner
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Any Questions?
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Student Survey
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Textbooks*Will be dismissed by rows
*Make sure you sign out the book on the
*COVER YOUR BOOK
Bring In PAPER BAG if you need help
survey (top corner)
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Do You Have Your...
• Pencil• Paper• Textbook• *Binder• *Calculator
If your syllabus is signed, turn the last page in to the 3rd hour basket as you come in.
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Aug 1110:40 PM
1.1 Variables in AlgebraGoals: • Evaluate variable expressions
EQ: How do you evaluate an expression that has variables?
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VocabularyVariable:
Values:
Variable expression:
Numerical expression:
Evaluate:
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Example 1: Describe the Variable ExpressionVariable Expression OperationMeaning
__ times __
__ divided by __
__ plus __
__ minus __
________
________
________
________
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Example 2: Evaluate the Variable ExpressionEvaluate the variable expression when x = 5.
Expression SimplifySubstitute
a. 5x
b.40x
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Try It Evaluate the variable expression when x = 4.
1. 10x 2. 20x 3. 10 x 4. x + 8
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Example 3: Evaluate rt to Find DistanceFind the distance d traveled in 30 minutes by a remote control car going an average speed of 10 miles per hour. Use the formula: distance equals rate r multiplied by time t.**Formula: d = rt
Answer: The distance traveled by the remote control car was ____ miles.5
*Make sure Units match, otherwise convert
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Try ItUsing a variable expression, find the distance traveled in 20 minutes by a remote control car moving at an average speed of 9 miles per hour.
5.
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Example 4: Find the PerimeterThe perimeter P of a triangle is equal to the sum of the lengths of its sides:
P = a + b + cFind the perimeter of the triangle in meters.
1. Write the formula
2. Substitute
3. Simplify
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Try It6. Find the perimeter of a triangle with sides 7 centimeters,
12 centimeters, and 17 centimeters long.
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SummaryHow do you evaluate an expression that has variables?
EQ:
Homework:p.6 #1832, 3442even