Sec 1: Evaluating Expressions

Pre-Unit: Intro to Algebra II

Learning Target: I will evaluate algebraic expressions for a given value using the order of operations and technology.

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15 + 10 x 0 = ?

Like = 0 Share = 15

Comment = 25Write what you think it is in your notes.

And the answer is…15Second Chance:

Like = 2Share = 288Comment = both

Write your answer in your notes.

Answer: 288

P___________ E___________ M__________ D__________ A__________ S___________

Order of Operations

• Simplify (6-2)² - 4 + 9 ÷ 3 using the order of operations.

• Check yourself using your calculator.

• Did your answers match? If not, where did you go wrong?

arentheses

ultiply

xponents

ubtraction

ivide

ddition

A. for

B. if and

Ex 1: Evaluate each expression using the order of operations and then check using your calculator.

•

Solution: 625

Solution: -78.968

Evaluate for w = 4, x = -3 and y = -5.

Ex 2: The Challenge!

The formula for the area A of a trapezoid is , where h represents the height, and b1 and b2 represents the measures of the bases. Find the area of a trapezoid with base lengths of 13 meters and 25 meters and a height of 8 meters.

Ex 3: Geometry

The average price for a movie ticket can be represented by where y is the number of years since 1980.

a. Find the average price of a ticket in 1990, 2000, and 2010.

b. Another equation that can be used to represent ticket prices is . Find the price of a ticket in 1990, 2000 and 2010.

c. How do the values in part b compare to those found in part a?

EX. 4

PG 7 # 1-10, 17, 24, 27, 38, 43Show all work using the order of operations. You may use the calculator for only one operation at a time. Do NOT put the entire expression in the calculator.

Round to the 3rd decimal place when necessary.

H.A.2.-HOMEWORK