Sheila either walks or cycles to school. The probability that she walks to school is 0.65
If she walks, the probability that she is late is 0.4
If she cycles, the probability that she is late is 0.1
Work out the probability that on any one day Sheila will not be late for school

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers