Mr. Santos treated his students and adult chaperones to a movie for winning the state contest. There were 20 fewer adults than students that attended. The movie theater charged $ 4 for each student and $ 6 for each adult. If Mr. Santos spent $ 180 on movie tickets, write a system of equations that represents the number of adult tickets, a, and the number of students tickets, s, that were purchased.

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!

answer: you need the equation in the question so i can answer it

step-by-step explanation:

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.