Answers

1. The value of d is 9 due to the pair of angles being complementary. which is the correct answer would be option (D).

   What are complementary angles?

   The complementary angles are defined as when pairing of angles addition to 90° then they are called complementary angles. There are two types of supplementary angles.

   We have been given that the pair of angles as:

   27° and (8d − 9)°

   Here, the pairing of angles sums up to 90° then they are called complementary angles.

   So, 27° + 8d − 9 = 90°

   ⇒ 27 + 8d − 9 = 90°

   ⇒ 8d = 90 – 27 + 9

   Apply the subtraction operation,

   ⇒ 8d = 72

   ⇒ d = 72/8

   Apply the division operation,

   ⇒ d = 9

   Therefore, the value of d is 9.

   Learn more about complementary angles here:

   brainly.com/question/5708372

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2. The answer is d=9 because complementary means it is a right angle meaning it is 90 degrees, so u find a number that multiplies by 8 to find a number a little bigger then the number 90 after u add the starting number

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