Astudents cost for last semester at her community college was $2800. she spent $504 of that on books. what percent of last semesters college cost was spent on books

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

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.