What ratio is equivalent to 7:3?

Which of the following transformations will always produce a congruent figure?

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

David and alton are training for a race. they spend 35 minutes stretching and then go on a 5 mile practice run. david runs at a pace of 7 min/mile. alton runs at a pace of 8 min/mile. write an equation for each runner that shows the total length of their workout. then solve each equation showing your work