Question

What is the solution of log small7 (4x + 5) = 2?
A) 2
B) 6
C) 9
D) 11
E) 14

Answer 1

\[\huge \log_7(4x+5) = 2\]

Answer 2

is the equation like this... ?

Answer 3

yes

Answer 4

\[\huge {\log_ba =x\\=> a = b^x}\]

Answer 5

\[\huge4x+5 = 2^7\]
\[\huge4x+5 = 128\]

now its easy.... ?

Answer 6

yes thanks

Answer 7

are you sure thats right because i'm getting 30.75 and thats not one of the answers

Answer 8

It's wrong. He gave you the right theorem, but used it incorrectly. It's:
\[4x+5=7^{2}\]

Answer 9

RHS should be 49
its not 128

Answer 10

@Wired thanks for catching :)