First, combine 20c and 10c because they are like terms then combine 8d and -5d.
It would look like this:
20c+8d+10c-5d
30c+3d
Hope that helps
Answer:

Step-by-step explanation:

Subtracting 4x from both sides of the inequality.

Simplifying the inequality.

MOE = +\- 1.27
Confidence Interval is 53.73 to 56.27
Just add 32 + 33 = 65. 65 would be the minimum amount.