Solve the following system of equations by linear combination: 3x+2y=7 y=x-4

15/16 as a decimal rounded to the nearest hundredth

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

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