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satela [25.4K]
3 years ago
9

Need help and show work plz

Mathematics
2 answers:
ratelena [41]3 years ago
6 0
The answer is 15 degrees
egoroff_w [7]3 years ago
3 0
<h3>Answer: (A) 15 degrees</h3>

====================================================

Explanation:

With any parallelogram, the adjacent angles always add to 180 degrees.

(angle ADC) + (angle DCB) = 180

(angle ADC) + 120 = 180

angle ADC = 180 - 120

angle ADC = 60 degrees

--------

Angles 1 and 2 combine to form angle ADC by the angle addition postulate. This is just the idea of gluing smaller angles to form larger ones.

(angle 1) + (angle 2) = angle ADC

45 + (angle 2) = 60

angle 2 = 60-45

angle 2 = 15 degrees

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We are to simplify the expression (x+3)(x^2−5x+2). This is as shown;

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