Hi.
-19 + 12 is the same as saying 12 - 19
So, -19 + 12 = -7
You're welcome.
Answer:
The answer is D, at khan academy. :)
Step-by-step explanation:
I hope it helps you even if it's a little late. :)
Answer:
the answer is -5
Step-by-step explanation:
m∠BAC = 27°
Solution:
ABCD is a quadrilateral.
AB and CD are parallel lines.
Given m∠BCD = 54°
AC bisect ∠BCD.
m∠DCA + m∠CAB = m∠BCD
m∠DCA + m∠DCA = 54° (since ∠ACB = ∠DCA)
2 m∠DCA = 54°
Divide by 2 on both sides, we get
m∠DCA = 27°
AB and CD are parallel lines and AC is the transversal.
<em>If two parallel lines cut by a transversal, then the alternate interior angles are equal.</em>
m∠BAC = m∠DCA
m∠BAC = 27°
Hence m∠BAC = 27°.
I think it’s C but I may be wrong
