Has a beaker containing 40 litres of a 20% acid solution. How much pure acid should be added to increase it to a 50% concentration?

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.

where are the graphs?

step-by-step explanation:

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.