Suppose u and v are p. 21.) subspaces of r". prove that (u + v)- = u-n v. (see the footnote on

Arectangle has an area of 54 square feet. if the length is 3 feet more than the width, find the dimensions of the rectangle.

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

In which form is the following function written? y = - 2(x – 3)(x + 5)