On any trip the time you travel in a car varies inversely with the car's average speed . The function t = 60/r * r * e represents the time it takes to travel 60 mi at different rates . Will the graph ever intersect the horizontal axis ? The vertical axis ? Explain your reasoning .

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?