The answer to this would be highly appreciated

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?