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# Alg1 sections 1.1-1.2

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### Transcript

• 1. Chapter 1 Sections 1 and 2
• 2. PEMDAS  Parenthesis  Exponents  Multiplication and division.  As they appear from left to right.  Addition and subtraction.  As they appear from left to right.
• 3.
• 4. A power is an expression that represents repeated multiplication of the same factor. Example – 64 is a power of 4 because 4 x 4 x 4 equals 64 A power can be written using two numbers a base and an exponent.  n2 n to the second or n squared  n3 n to the third or n cubed  n4 n to the fourth  n5 n to the fifth
• 5.
• 6. 8 / 20 / 13
• 7. 13 – 8 + 3
• 8.  You can estimate the distance in cm that a leopard frog can jump using the expression 13l where l is the frog’s length in cm. What distance can a leopard frog that is 12.5 cm long jump?
• 9.  Olivia was the leading scorer on her soccer team. She scored 120 goals and had 20 assists in her DIS career. (a) The number n of points awarded for goals is given by 2g where g is the number of goals scored. How many points did Olivia earn for goals? (b) The point total is given by n +a where a is the number of assists. Use your answer from part (a) to find Olivia’s point total.
• 10.  If you know how tall you were at the age of 2, you can estimate your adult height (in inches). Girls can use the expression 25 + 1.17h where h is the height (in inches) at the age of 2. Boys can use the expression 22.7 + 1.37h. Estimate the adult height of each person to the nearest inch. (a) A girl who was 34 inches tall at age 2. (b) A boy who was 33 inches tall at age 2.
• 11.  PEMDAS  Operation  Grouping symbols  Variable  Algebraic expression  Evaluate  Power  Base  Exponent
• 12. Pages 5-7  #3-15, 19, 23, 27-45 odd, 48, 51, 54 Pages 10-12  #3-19, 21-33 odd, 35, 38, 39