Adam works at a bookstore. He packed 20 identical paper-backs and 9 identical textbooks in a box. It weighed 44.4 pounds. He then added 1 more paper-back and 5 more textbooks in the box, and it now weighed 51 pounds. Write a system of equations that can be used to determine the mass, in pounds, of 1 paper-back, P, and the mass, in pounds, of 1 text-book, T.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave

Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. what is the percentage decrease of jane’s closet space?

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie