Perform the operation. (-7x^2 - 10x - 6) + (-3x^2 + x)

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?