Suppose is a semester that 38% of students at a college failed mathematics, 27% failed physics, and 9% failed both. a student is selected at random.
a)if a student failed physics, what is the probability that he or she failed math?
b)if a student failed math, what is the probability he or she failed physics?
c)what is the probability that he or she failed math or physics?

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?