*long day my brain hurts* i just need to know one answer

student tickets cost 5$ each adult tickets cost 10$ each a total of 4,500$ was collected. 700 tickets were sold.

write a system of equations that can be used to find the number of student tickets, s, and the number of adult tickets, a, that were sold at the playoff game

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.