Find a number that is more than 50 but less than 100. when the number divided by 7, the remainder is 4. when the number is divided by 10, the remainder is 8. what is the number?

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?