Answer:
B
Step-by-step explanation:
Using the rules of logarithms
logx + logy = log(xy)
[tex]log_{b}[/tex] x = n ⇒ x = [tex]b^{n}[/tex]
Given
[tex]log_{x}[/tex] 5 + [tex]log_{x}[/tex] 12 = 7 , then
[tex]log_{x}[/tex] (5 × 12) = 7 , that is
[tex]log_{x}[/tex] 60 = 7 , thus
[tex]x^{7}[/tex] = 60 → B
