Answer:
21) 86°
22) 23°
Step-by-step explanation:
21) Since Angle ADC is 135,
7x + (11x+9) = 135
18x + 9 = 135
18x = 126
x = 7
Since we have to find Angle BDC,
Substitute 'x = 7' into '11x+9':
11(7) + 9
= 77 + 9
= 86
22) Since Angle NRQ is 78,
(8x+7) + (4x-1) = 78
12x + 6 = 78
12x = 72
x = 6
Substituting 'x = 6' into '4x-1'
4(6) - 1
= 24 - 1
= 23
Feel free to mark this as brainliest! :D
