Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.

ying works in the shipping department of a toy factory that makes radio-controlled helicopters. small helicopters weigh 3 pounds each, and are shipped in a container that weighs 18 pounds. large ones, on the other hand, weigh 4 pounds apiece, and are shipped in a container that weighs 12 pounds. if these boxes can hold a certain number of helicopters each, all of the packed containers will have the same shipping weight. how many helicopters would fit in either container? what would the total weight be?

In new york city at the spring equinox there are 12 hours 8 minutes of daylight. the longest and shortest days of the year very by two hours and 53 minutes from the equinox in this year the equinox falls on march 21 in this task you use trigonometric function to model the hours of daylight hours on certain days of the year in new york city a. what is the independent and dependent variables? b. find the amplitude and the period of the function. c. create a trigonometric function that describes the hours of sunlight for each day of the year. d. graph the function you build in part c. e. use the function you build in part c to find out how many fewer daylight hours february 10 will have than march 21. you may look at the calendar.