If triangle ABC is rotated 90 degrees clockwise about the origin, what is the coordinates of B'?

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.