I need help with my 5th grade math if you can help it would be great

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

What is the best estimate of the length of a football

Hurry can a triangle can be constructed with angles measuring 115°,55°, and 20°? yes or no