18- 3. Your family is planning to take the Amtrak train from Hartford to New York City for a day trip. As a result
of some research you learn that your friend Jackie took the train with a group of 3 adults and 5 children and
it cost them $269.50. A cousin also took the train to the city with a group of 2 adults and 3 children and it
cost them $171.50. Find the price of an adult's ticket and the price of a child's ticket.

Find the value of x for which the lines are parallel.

Use the net as an aid to compute the surface area of the triangular prism. a) 550 m2 b) 614 m2 c) 670 m2 d) 790 m2

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?