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Find the LCD of the ration expressions: A) [9x/(x^2-z^2)] [3/(x^2-2xz+z^2)] B) [x/(x^2-64)] [2/(40-5x)] [7/x]

A rectangular page is to contain 72 square inches of print. The page has to have a 4 inch margin on top and at the bottom and a 2 inch margin on each side. Find the dimensions of the page that minimize the amount of paper used.

Suppose you measure a standing person's blood pressure by placing the cuff on his leg 0.470 m below the heart. Calculate the pressures you would observe if the pressures at the heart are 119 over 80 mm Hg. Assume there is no loss of pressure due to resist...

Concrete is pumped from a cement mixer to the place it is being laid, instead of being carried in wheelbarrows. The flow rate is 250 L/min through a 50.0 m long, 8.00 cm diameter hose, and the pressure at the pump is 8.50 ✕ 106 N/m2 (about 1200 psi). (a)...

Mari has 39 square feet of patio bricks. Each square brick has side 1 foot long. What is the greatest perimeter of a rectangle that she can make with the bricks?