Ateacher had 21 red pens. if the ratio of red pens to blue pens she owned was 3: 1, how many pens did she have total?

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?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5