Ricardo ran the 400 m race three times. His fastest time was 54.3 seconds hey slow as time was 56.1 seconds. If his average time was 55.0 seconds, what was his time for the third race?

How do you find the area of a triangle

What expression is equivalent to 42x-56y

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2