Friday

November 21, 2014

November 21, 2014

Posted by **Katie** on Saturday, April 6, 2013 at 1:04am.

0.4^x = 27

- math -
**Reiny**, Saturday, April 6, 2013 at 1:18am27 = .4^x

3^3 = .4^x

(2^b)^3 = .4^x

2^(3b) = (2/5)^x

2^(3b) = (2/(2^a))^x

2^(3b) = 2^x / 2^(ax)

2^(3b) 2^(ax) = 2^x

2^(3b+ax) = 2^x

3b + ax = x

x-ax = 3b

x(1-a) = 3b

x = 3b/(1-a)

**Answer this Question**

**Related Questions**

math - Let 2^a = 5 and 2^b = 10. Using exponent rules, solve the equation in ...

math - Let 2^a = 5 and 2^b = 7. Using exponent rules, solve the equation in ...

Pre calculus - How do I solve this exponent problem? I understand the exponent ...

math - what are division rules as it applies to the following 0/71= 23/23= 29/1...

pre-algebra - Solve the equation- w(-2)=14 m-7= -3 -3h= -42 Here are some basic ...

Algebra - How do you simplify the following and please show all work. (-3x(-4 ...

Math - Solving Equations with Grouping Symbols: 3(g-3)=6 Please explain how to ...

math/117 - Explain three rules for exponents listed in the chart on p. 239 (...

Math 9 - use exponent rules to simplify. Write as a single power, dont need to ...

Calculus - I am unsure of how to take the derivative of this equation. It may be...