Respuesta :

echoesofreason
if a = 7, then we can substitute 7 for a in the equation [tex]a^{3} [/tex].

[tex] 7^{3} [/tex] = 7 · 7 · 7 = 343
apologiabiology
ok so remember
x^n means x times itself n times
example
x^2=x times x
x^4=x times x times x times x
so

a^3
a=7
a^3=a times itself 3 times therefor
a^3=a times a times a
subsitute 7 for a
7^3=7 times 7 times 7
7^3=343