Can someone please help me

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Mike wants to make meatloaf. his recipe uses a total of 8 pounds of meat. if he uses a 3 to 1 ratio of beef to pork, how much pork will he use? enter your answer as a mixed number in simplest terms.