ALGEBRA 1Chapter 1

Sections 1 and 2

Evaluate the following

1. 2.

3. 4.

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.

Now try this

16

[6+18 ]−22

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

PEMDAS

Insert grouping symbols in the expression so that the value of the expression is 14.

TODAY’S DATE IS THE 20TH

8 / 20 / 13

Can you solve the following?

13 – 8 + 3 4𝑛−123w – z when w = 9.5 and z = 2.8

x2 when x =

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?

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.

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.

Vocabulary

PEMDAS Operation Grouping symbols Variable Algebraic expression Evaluate Power Base Exponent

HOMEWORK

Pages 5-7 #3-15, 19, 23, 27-45 odd, 48, 51, 54Pages 10-12 #3-19, 21-33 odd, 35, 38, 39