I hope this helps you
6r-7r=13-7
-r=6
r= -6
Opposite sides of a parallelogram are equal if that gives you a clue :)
Update : photo with explanation .. sorry about handwriting
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Answer:
c
Step-by-step explanation:
30°+90°+x=180° (the sum of interior angle of a triangle is 180°)
120°+x=180°
x=180°-120°
x=60°
When comparing correlation, focus on the MAGNITUDE of r:
Compare |0.828| with |-0.879|. Which magnitue is greater? The r value with greater magnitude represents the stronger correlation.
I think it is the third one from the top