Unit 1 Section 1 Write Expressions & Equations.notebook
September 02, 2015
Bell Ringer­
1. Pick up the packet
at the
Bell Ringer location
2. Take out your Homework
­Signed Expectations
3. Answer these questions in your math notes
1.)
31
4
3.)
­15 3 2
8
+ 2 31
.
2.)
1 9 ­ 2
4.)
­2 2 ÷ ­ 1
9
3
3
14
7
Aug 27­10:41 AM
Write and Translate Expressions and Equations
Oct 6­8:13 AM
Unit 1 Section 1 Write Expressions & Equations.notebook
September 02, 2015
Vocabulary
Variable: A symbol used to express a number or more than one number.
Variable or Algebraic Expression: An expression that contains one or
more variables.
Examples:
Numerical Expression: An expression that contains numbers
and operation symbols, but no variables.
Examples:
6+7-3
Expression means NO EQUALS SIGN!
eQuation means eQuals sign!
Oct 6­8:15 AM
Fill in words that go with each symbol. These are the words you need
to look for to translate into equations and expressions.
+
-
*
÷
What are some words for "equals"...
Oct 6­8:18 AM
Unit 1 Section 1 Write Expressions & Equations.notebook
September 02, 2015
Example 1: Define a variable for each phrase, then write an expression that represents the phrase.
1)
The sum of 3 and some number y.
2)
the product of some number x.
3)
A number decreased by 107.
4)
99 less than a number.
5) The quotient of a number and ­24.
Oct 6­8:19 AM
Example 2: Define a variable for each phrase, then write an equation that represents the phrase.
6)
The difference between x and y is 6.
7)
Nineteen is 7 more than twice z.
8)
The sum of 3 times a number and 2 is 4.
9)
Three times the sum of a number and 2 is 4.
10) Eight taken away from twice the quantity of four and a number.
Oct 6­8:21 AM
Unit 1 Section 1 Write Expressions & Equations.notebook
September 02, 2015
Example 3:
A state park charges an entrance fee of $20 plus $18 for each night of camping. Which equation describes the total cost c of camping for n nights.
A.) n = 20 + 18c
B.) c = 18n
C.) c = 18n + 20
D.) c = 20n + 18
Oct 6­8:20 AM
Example 4:
John is taking 8 people to Dorney Park, plus
himself. Each ticket costs x dollars and each
meal plan costs $15. John spends a total of
$450 for everyone to go to Dorney Park. Write
an equation to represent this scenario.
Aug 29­9:45 AM
Unit 1 Section 1 Write Expressions & Equations.notebook
Homework:
Homework Packet pages 2 and 3
Aug 29­9:49 AM
Sep 1­3:17 PM
September 02, 2015
Unit 1 Section 1 Write Expressions & Equations.notebook
Sep 2­7:23 AM
Sep 2­9:10 AM
September 02, 2015