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Mathematics 17 Online
OpenStudy (anonymous):

help plzz

OpenStudy (anonymous):

Evaluate the expression 3.14(a2 + ab) when a = 4 and b = 2

Mehek (mehek14):

\(3.14(a^2+ab)\) ?

rebeccaxhawaii (rebeccaxhawaii):

okay 3.14(4^2+4*2)

OpenStudy (anonymous):

yeah that i just dont get wht im supose to do

Mehek (mehek14):

plug int eh values you are given

rebeccaxhawaii (rebeccaxhawaii):

what is 4*2?

OpenStudy (anonymous):

8

rebeccaxhawaii (rebeccaxhawaii):

what is 4*4?

Mehek (mehek14):

\(3.14(4^2+4*2)\) start with simplifying what's in the parenthesis

OpenStudy (anonymous):

16

rebeccaxhawaii (rebeccaxhawaii):

remember \[4^2=4*4\]

rebeccaxhawaii (rebeccaxhawaii):

okay good so 3.14(16+8)

rebeccaxhawaii (rebeccaxhawaii):

then distribute

OpenStudy (anonymous):

ok so u just multiply the same number by the xonent

OpenStudy (anonymous):

ok

rebeccaxhawaii (rebeccaxhawaii):

(3.14*16)+(3.14*8)

OpenStudy (anonymous):

is it 75.36

OpenStudy (anonymous):

?

rebeccaxhawaii (rebeccaxhawaii):

yes c:

OpenStudy (anonymous):

thxxs

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