Answer:
a = -10
Step-by-step explanation:
89 + 10a + 2 = a + 1
91 + 10a = a + 1
9a = - 90
a = -10
Answer:
C. 19,005 feet
Step-by-step explanation:

hence,
our answer is C)
Answer:
The unknown number is 66.
Step-by-step explanation:
We know that we need to find the number that is 55 when calculated as 5/6 or the whole number. First, we must divide 55 by 5.
55 ÷ 5 = 11
This means that 1/6 of the unknown number is 11.
Now, let's multiply 11 by 6.
11 x 6 = 66
Therefore, the unknown number is 66.
Hope this helps! :)