One person can complete a typing project in 6 hours, and another can complete the same project in 9 hours. how long will it take the two people working together to complete the project?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.