In a college math class of 50 students, 23 are boys and 27 are girts. On the final exam, 15 boys and 14 girls made an A. What is the
probability of choosing a boy or an A student if a student is chosen at random from the class?

Which equation represents the partial sum of the geometric series?

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?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles