Simplify:

3 x 10^3 + 9 x 10^-3 divided by 4 x 10^8

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is

Shelly bought a house five years ago for $150,000 and obtained an 80% loan. now the home is worth $140,000 and her loan balance has been reduced by $12,000. what is shelly's current equity?

If julia has a value of x5.4 that is equivalent to x10.9 true or false. explain