How do you algebraically solve systems of equations/inequalities

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Select the quadratic that has root x = 8 and x = -5