readergirl12
  • readergirl12
What is the value of the expression when a = 3 and b = 2? 3a^3+2b^3 A. 78 B. 97 C. 135 D. 745
Mathematics
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SOLVED
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katieb
  • katieb
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readergirl12
  • readergirl12
\[3a^3+2b^3\] Thats what it looks like.
Nnesha
  • Nnesha
substitute a for 3 and b for 2 a=3 b=2
readergirl12
  • readergirl12
I dont understand...I've never been very good in math.. ._.

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Nnesha
  • Nnesha
well given : a = 3 and b =2 so we can replace a for 3 and b for 2
Nnesha
  • Nnesha
\[\huge\rm 3\color{ReD}{a}^3+2b^3\] . given is a =3 so i'm going to replace a for 3 \[\huge\rm 3\color{ReD}{(3)}^3+2b^3\] . same with b
readergirl12
  • readergirl12
97..
Nnesha
  • Nnesha
exponents tells us how many times we should multiply the base so for example 4^3 would be 4*4*4

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