Which of the following must be true? the diagram is not to scale.

a. ab < bc
c. bc < fh
d. ac < fh

D. AC < FH

Step-by-step explanation:

We know that,

Hinge Theorem states that 'if two sides of a triangle are congruent to the two sides of an another triangle and the included angle of the first triangle is larger than the angle of the second triangle, then the third side of the first triangle is greater than the third side of the second triangle'.

Now, according to our figures, we see that,

In ΔABC and ΔHGF, sides AB is congruent to HG and BC is congruent to GF. Also, ∠HGF = 74° and ∠ABC = 31°.

Since, 74 > 31. Therefore, ∠HGF > ∠ABC.

So, according to the 'Hinge Theorem', side FH is greater than AC or AC is less than FH.

Hence, AC < FH.

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.