What is the answer to this

Work Shown:

Focus on triangle DEC. We have angle C is 48 and D is 74. Let's find angle E.

D+E+C = 180

74+E+48 = 180

E+122 = 180

E = 180-122

E = 58

In the sequences ABC and DEC, we have B and E as the second letters. The order is important because the angles must align properly (so we know how they pair up). Therefore, angle B = angle E because triangle ABC = triangle DEC.

Furthermore,

angle B = angle E

2x = 58

x = 58/2

x = 29

0.65 percent

Step-by-step explanation:

because 13/21 was doing it and therefor you divide 13 by 21 and get 0.65