What is the solution set for the system 2x+6=6-6y and 4+4(x+2y)=9y+4

Find the value of the cosine for angle a

Which sentence uses an objective tone? we will plant the best garden of any school in the area. the new campus garden will surely be envied by other schools. a garden would provide numerous benefits to the students. you will probably agree that gardens have many benefits.

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12