Triangle BCD with vertices B(2,-1), C(4,1) and D(5,-2) is : scale factor=3 centered at the origin

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

One side of a rectangle is 7 centimeters shorter than six times the other side. find the length of the longer side if we also know that the perimeter of the rectangle is 266 centimeters.