Tom takes exactly 30 minutes to rake a lawn and his son mike takes exactly 60 minutes to rake the same lawn. if tom and mike decide to rake the lawn together, and both work at the same rate that they did previously, how many minutes will it take them rake the lawa. 16 b. 20 c. 36 d. 45 e. 90

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?

What is the equation of the graph below? y=sec(x)-4

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?