August 23, 2016
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Transcript of August 23, 2016
Today:
Practice Problems: Translations, One-Step Equations
A Closer Look at the Khan Academy
Reminder: CW1.1 Due Today for full credit
Classwork Grading Criteria
08/23/16
New Vocabulary: (2)
2. Like Terms:
Vocabulary:
In algebraic expressions & equations, like terms are terms that contain the same variables raised to the same power. Only the coefficients of like terms can be different.
1. Coefficient:
Examples include: 7x x -2x
()xy2 -2y2x 6xy2
Adding & Subtracting like terms is just combining the coefficients.3x - 2x = 2x2 + 5x =
Registered
Students:
Coaching the Khan Academy:
Practice Problems Section of your
Notebook
5(173 + 32)
64 -150
58
Write an expression to represent: Three minus the quotient of a number
and six.
Write an expression to represent: Three less than three times a number x.
Translating Expressions
Practice Problems: Translating Equations
1. Buck has $20 more than Roger. Together they have $90.
How much does each one have?
2. Peter has $6 more than Meg. Chris has $18 more than Peter. They have $84 all together. How much does each one have?
3. The sum of 3 consecutive numbers is 87. What are the three numbers?
Key Concept: Always Assign the variable to the smallest, least, lightest, shortest, etc. Every other number is shown by its relationship to the variable.
4. Jay worked 6 hours less than May. Together they worked 64 hours. How many hours did each work?
Solving One-Step Equations:
1. n + 6 = 12
Pencils Down; Mental Math Only!!
2. 56 = 7x
3. y - 17 = 41
4. = 4 **6. = 45. 8m = 48
Last Slide