Ralph is trying to solve the system of equations. he begins by subtracting ax from both sides of equation (1), and then he divides the equation by b. before he can continue, his friend alice comes along and says, "no, you should have subtracted by from both sides, and then divided by a. you will get the wrong answer." is alice right? why or why not? a) yes; ralph's way will make y disappear, resulting in no solution. eliminate b) yes; ralph should isolate x in both equations. now his answer will be wrong. c) no; ralph is substituting for y, alice is substituting for x. both ways will work. d) no; ralph is using substitution, while she is trying to use elimination. both ways will work.

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.