7 algebraic formula f3
TRANSCRIPT
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ALGECFORMCHAPTER 7: F
3
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7.1
Concept of Variable
Constant
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LEARNING OBJECTIVE:
At the end of this subtopi students shoto:
i# dete$%ine if " &u"ntit' in " (i)en situ)"$i"b!e o$ " onst"nt#
ii# dete$%ine the )"$i"b!e in " (i)en situ$ep$esent it *ith " !ette$#
iii# dete$%ine the possib!e )"!ues of " )"(i)en situ"tion#
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Definition:
+ARIABLE : &u"ntities "$e not
CO./TA.T : &u"ntities "$e ,-
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Variable / Constant?SITUATION VARIABLE/ C
i0 The nu%be$ of hou$s in " d"'
ii0 The speed of " fo$%u!" one "$ in "Fo$%u!"
One R"eiii0 .u%be$ of students in " shoo! bus
e)e$'d"'
i)0 Tot"! nu%be$ of sides of " s&u"$e
)0 B!ood p$essu$e of footb"!! p!"'e$
)"$i"b
)"$i"b
)"$i"b
onst"
onst"
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Variable and letter?SITUATION VARIABLE
Hei(ht of e"h students in'ou$ !"ss
Hei(ht of student
.u%be$ of students p$esent
in 'ou$ !"ss e)e$' d"'
.u%be$ of students
.u%be$ of boo1s th"t 'oub$in( to shoo!
.u%be$ of boo1s
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7.2
Concept of Formu
to Solve Problem
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LEARNING OBJECTIVE:
At the end of this subtopi students sh"b!e to:
i# 2$ite " fo$%u!" b"sed on " (i)en
"0 /t"te%entb0 situ"tion
ii# Identif' the subet of " (i)en fo$%
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Definition
Fo$%u!" : "n e&u"tiononnet )"$i"b!e*ith "si(n#
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Write a formulaE-"%p!e 8
Const$ut fo$%u!" fo$ the pe$i%ete$9 p %9 of the $
" %
b %
Pe$i%ete$ 5 ""bb
5 ;" ;b
5 ;
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Subject of Formula
/ubetfo$%u!"
/in(!e!ine"$
)"$i"b!e
A 5 ;
Coe=ient subet
is 8A
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Change Subject of the Formula
E-"%p!e ;
Ch"n(e the subet of the fo!!o*in( fo$%u!"e to the !ette$ (i)en in b$"1
"0 b0 0
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