Answer:
<h3>
d = 6</h3>
Step-by-step explanation:

The arithmetic formula is expressed as an = a1 + d *(n-1)where n is an integer. Substituting from the given a1 = -12 and a27 = 66, 66 = -12 + d *(27-1). hence , d is equal to 3. a42 thus using the formula is equal to 111. The final answer to this problem is 111.
If e is between them, then the distances DE and EF add to the total, DF. So the answer is just 27 + 34 which is 61, A
Serving to induct or bring in; introductory
11.4 - 15.7 = -4.3. The temperature at midnight is -4.3<span>°F.
Hope this helps! Have a great day :)</span>