Solve the system of equation by using the linear combination method. explain each step in solving using the linear combination method. show all of your work.

2x + 3y = 1

y= -2x - 9

respond to the question in your own words with proper explanations and use of math vocabulary.

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.