Solve the system of equations
15x -2y = 4
20x - 3y = 1

Matteo makes raspberry punch. the table shows how many parts ginger ale and raspberry juice to use for a batch. raspberry punch parts ginger ale 2 parts raspberry juice 3 matteo decides to add one part of raspberry juice. what is the new ratio of ginger ale to raspberry juice?

The image of the point (-6, -2)under a translation is (−7,0). find the coordinates of the image of the point (7,0) under the same translation.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.