C = 5(F -32) /9; for F​

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?

Percent increase and decrease. original number: 45 new number: 18