So the percentage would be 40% and then the ratio would be 3:4
A=90 degrees divide by 5
=18 degrees
2c+a=90
2c+18=90
2c=90-18
2c=72
divide each side by 2
c=36
therefore:
2c=72
b=4a+c
b=4(18)+36
b=72+36
b=108
Step-by-step explanation:
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Elements of N should be like {6,7}