1-8 An Introduction to Equations

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Transcript 1-8 An Introduction to Equations

1-8 An Introduction to Equations
Goals
Solve equations using tables and
mental math
Vocabulary

Equation

Open sentence

Solution of an equation
Is the Equation True, False, or Open
 85
+ (-10) = 95
 29
– 34 = -5
 4a
– 3b = 21
Is the given number a solution?
 5b
2
+ 1 = 16; -3
= 10 – 4y; 2
 -6b
+ 5 = 1; ½
Use Mental Math to Find the Solution.

x – 3 = 10

18 + d = 24

m/3 = 4

6t = 36
Correct Homework
Use a Table to Find the Solution
 10.5


= 3n – 1
3(5) – 1 = 14 (too high)
3(2) – 1 = 5 (too low)
n
3n – 1
2
3(2) – 1 5—too low
3
3(3) – 1 8—too low
4
3(4) – 1 11—too high
5
3(5) – 1 14—too high


Value of 3n - 1

Use mental math to find an
upper and lower boundary
Make a table beginning and
ending with your numbers.
Use the table of values to
estimate the solution of the
equation
– n is between 3 and 4
Practice On Your Own

P. 56 #8 – 24, 26, 28, 36, 50-82 eoe

Accelerated Math when finished