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

Question

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

readergirl12 · Answer

$$3a^3+2b^3$$  Thats what it looks like.

nnesha · Answer

substitute a for 3 and b for 2 
a=3 b=2

readergirl12 · Answer

I dont understand...I've never been very good in math.. ._.

nnesha · Answer

well given : a = 3  
and b =2 
so we can replace a for 3 and b for 2

nnesha · Answer

$$\huge\rm 3\color{ReD}{a}^3+2b^3$$    .
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 · Answer

97..

nnesha · Answer

exponents tells us how many times we should multiply the base 
so for example 4^3  would be 4*4*4