alg1 sections 1.1-1.2
TRANSCRIPT
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ALGEBRA 1Chapter 1
Sections 1 and 2
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Evaluate the following
1. 2.
3. 4.
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Order of Operations
PEMDAS Parenthesis Exponents Multiplication and division. As they appear from left to right. Addition and subtraction. As they appear from left to right.
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Now try this
16
[6+18 ]−22
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ExponentsA 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
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PEMDAS
Insert grouping symbols in the expression so that the value of the expression is 14.
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TODAY’S DATE IS THE 20TH
8 / 20 / 13
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Can you solve the following?
13 – 8 + 3 4𝑛−123w – z when w = 9.5 and z = 2.8
x2 when x =
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Problem Solving
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?
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Problem Solving 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.
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Problem Solving
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.
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Vocabulary
PEMDAS Operation Grouping symbols Variable Algebraic expression Evaluate Power Base Exponent
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HOMEWORK
Pages 5-7 #3-15, 19, 23, 27-45 odd, 48, 51, 54Pages 10-12 #3-19, 21-33 odd, 35, 38, 39