Please help algebra 2 questions 10 points!!!!!! quick

1)Solve. log{x – 1}(16)= 4

a. x = 2

b. x = 3

c. x = 4

d. x = 5


2)Evaluate. log3(1/81)

a. 27

b. 4

c. –27

d. –4


3)The base of a logarithmic function is a negative real number.

a. always

b. sometimes

c. never

Logs are easy if you remember the equivalents http://www.ifomia.com/formula/math/logar…

For 1: Use basic algebra to solve for x.
For 2: Re-write 1/81 in terms of 3. Hint 3 to what power equals 81?
For 3: It's a rule you should remember... just google it then memorize it.

It's better to learn and understand the rules, so you will know how to solve them on tests and such.