Answer:
x=20°
Step-by-step explanation:
(3x+10)° + x° = 90° (given in the picture.)
4x+10° = 90°
4x= 80°
x=80°/4
45 miles. 3*12 +3/4 *12 =x=>36+9=x=>x= 45.
6 -Question 13.4