Wolfrich lived in Portugal and Brazil for a total period of 14 months in order to learn Portuguese.
He learned an average of 130 new words per month when he lived in Portugal and an average of 150 new
words per month when he lived in Brazil. In total, he learned 1920 new words.
How long did Wolfrich live in Portugal, and how long did he live in Brazil?
Wolfrich lived in Portugal for
months and lived in Brazil for
months.

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4