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T is directly proportional to M.
If T = 20 when M = 4, find:

a) T when M=3
b) M when T=10

Sagot :

flyingcaprinekid

a) T when M=3

T = 15


 b) M when T=10

M = 2

Hippalectryon
By proportionality, for any number [tex]a[/tex], if T is multiplied by [tex]a[/tex] then the same goes for M.

a) M has been multiplied by [tex]\dfrac{3}4[/tex] hence [tex]T=20\cdot\dfrac{3}4=5\cdot3=15[/tex]

[tex]\boxed{T=15}[/tex]

b) T has been divided by [tex]2[/tex] hence [tex]M=\dfrac{4}2[/tex]

[tex]\boxed{M=2}[/tex]
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