The sum of the measures of angles in all quadrangles is 360 °. Therefore:

Answer:
54
Step-by-step explanation:
Answer:
6,400
Step-by-step explanation:
yeah fam 6,400 is the answer
6x-1=4x+6
subtracting 4x from each side
2x-1=6
adding 1 to each side
2x=7
divide by 2
x=7/2 or 3.5
check: 6(7/2) -1 =4(7/2)+6
21-1 =14+6
20=20 correct
The correct answer would be C
Hope this helped