3) Solve system algebraically:
y=x- 5x - 7
y = 5x + 9

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.