Rectangular blocks of limestone are to be cut up and used to build the front entrance of a new hotel. The volume, V, in cubic metres, of each block can be modelled by the function V(x) = 2x + 7x + 2x - 3. a) Determine the dimensions of the blocks in terms of x. b) What are the possible dimensions of the blocks when x = 1? Solve. Round answers to one decimal place, if necessary. a) 7x + 5x - 5x3 = 0 b) x + 9x = x + 6 Solve by factoring. a) 12x + 25x - 70 b) 6x + 13x - 41x + 12 0 c) -3x + 10x + 20x 40x + 32