Answer:
the answer is 5 because 40 divided by 8 is 5
The first number is 9 and the second number is 10. 10+9=10. 9*2=18 and 10 is 8 less than 18. All the requirements of the numbers are met.
The value of a is D)73 I think because 180-107 since a straight line is 180 u just subtract the angle from it. hope this helps.