Write all of the numbers that round to 80

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?