What are examples in the real world when you need to use the properties or rectangles?

100 points, hi, i’m not sure what to do here, the data doesn’t seem to be quadratic .? can anyone me, in advance

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults. how many students and adults went if the ticket charge was $42.75

How many solutions does the nonlinear system of equations graphed bellow have?