Triangle A C B is cut by bisector C D. The lengths of sides A C and C B are congruent. CD bisects ∠ACB. Which statements must be true? Check all that apply. AD = BD AC = CD m∠ACD = m∠BCD m∠CDA = m∠CDB m∠DCA = m∠DAC

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

∆red ≅ ∆ by rule will give brainiest if possible