On a piece of paper, use a protractor and a ruler to construct △abc with ab=8 cm , m∠a=70° , and m∠b=55° . what is ac ?
a)4 cm
b)6 cm
c) 8 cm
d)12 cm
make sure your answer is right !

C) 8 cm

Step-by-step explanation:

Given: In △ABC  AB=8 cm , m∠A=70° , and m∠B=55° .

The angle sum property of triangle says that the sum of all interior angles in a triangle is equals to 180°.

⇒ m∠A+m∠B+m∠C=180°

⇒70°+55°+m∠C=180°

⇒m∠C=180°-125°

⇒m∠C=55°

Now, in △ABC m∠C= m∠B= 55°

⇒AB=AC [∵ Sides opposite to equal angles of a triangle are equal]

⇒ AC= 8 cm.

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.

the answer is a

step-by-step explanation: