Discover Questions

If a+b+c=4, ab+ac+bc=6, and abc=3, what is 1/a + 1/b + 1/c? A constant current of 1A flow in circuit over period of 5s.total charge flowing through circuit over this duration will be.
Expert plz and? In one mole of the compound iron(III) oxide,
what fraction of the total number of ions is
the oxygen ion? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? How many 2 cubic ft. bags of mulch to fill a space that is 30 ft. x 16 ft. x 3 in's deep?