What is the answer to middle school math with pizzaz book D-74?

How do you calculate pressure when given density? What is a shape with 4 sides and has 4 corners? What is seven tenths take away seventeen fourteens? Write this in the form of single logarithm log x plus log y? What fraction is equal to 4 and two thirds? Are 6 and 9y unlike terms? How many syllables does substitute has? Numerical value for 500 689? What part of the fraction does not change when you add or subtract? What does a journey of a 100 miles begins with one step mean? How many people can sit at a dining table that is 84 X 40 inches? What is the formula for finding trapezoid? Does the name Dais have a meaning? How much edges does a hexagonal prism have? What is binomialterm? What is the difference between 15 and 20? -4 x - 7 equals 16? The four angles of a quadrilateral must always add up to how many degrees? How many times will 15 go in to 42? What does 6 and 1 over 8 equal as a percent?