Will some one join my zoom

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Solve the triangle. a = 21°, c = 105°, c = 5

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these