Use substitution to find the solutions for each system of linear equations .
1. Y = -3x
-6x + y = -9

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?