Answer:
c. 35
Step-by-step explanation:
(xⁿ)³ = (x¹³)⁵ₓ(x⁻⁸)⁻⁵
(xⁿ)³ = x¹³ˣ⁵ₓ x⁻⁸ˣ⁻⁵
(xⁿ)³ = x⁶⁵ ₓ x⁴⁰
(xⁿ)³ = x⁶⁵⁺⁴⁰
x³ⁿ = x¹⁰⁵
3n = 105
n = 105 : 3
n = 35
x^(3m) = x⁶⁵ × x⁴⁰
x^(3m) = x¹⁰⁵
3m = 105
m = 35
