The promoter of the rectangular playing field is 310 yards the length is 7 yards less than the double width. what are the dimensions of the playing field HELP

Which expression gives you the distance between the points (5,1)and(9,-6)

What number gives you a irrational number when added to 2/5

The equation m = 19.32v can be used to find the mass m in grams of a pure gold coin with volume v in cubic centimeters. carl has a coin with a mass of 37.8 grams. the coun's volume is 2.1 cubic centimeters. could the coin be pure gold? explain your reasoning. whoever answers this correctly gets marked brainliest! this is also worth a decent amount of points than normal questions!