Prove that the following triplets of the lines are concurrent. x+2y=0,3x-4y-10=0,5x+3y-7=0
2x-7y+10=0,3x-2y=0,x-12y+21=0
9x-13y-90=0,2x+11y-20=0,7x+y-70=0

For the given quadratic equation convert into vertex form, find the vertex and find the value for x=6 y=-2x^2+2x+2

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain

List the sides of δrst in in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°