Using substitution, what is the solution for y=2x+1 and 2x-y=3?

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180