There is a box of chocolates and one person easts one-fourth of the pieces and another person eats one-half of the remaining pieces. If there are now six pieces left, then how many pieces were originally in the box?

(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?

Asap! i'm not good math and i'm lost.

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11