Seven less than half the number is equal to -24. What is the number?

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?

Which of these lines passes through the point (1,-1) and has a slope of -3?

Acomputer company is testing a new booster to increase program load times. the box plots show the number of seconds it takes to load a program with and without the booster. using these plots, how much did the median change?