**Answer:**

6983/1000 OR 6.983

**Step-by-step explanation:**

6*1=6

9*1/10=9/10

8*1/100=8/100

3*1/1000=3/1000

6+9/10+8/100+3/1000=6983/1000

OR

6.983

Answer:

Mean = 43.969

Standard deviation = 12.341

Step-by-step explanation:

Given the data :

36.45, 67.90, 38.77, 42.18, 26.72, 50.77, 38.9, 50.06

The sample mean :

Σx / n = 351.75 / 8 = 43.969

Sample standard deviation :

√Σ(x - mean)²/n-1

√[(36.45-43.969)² + (67.90-43.969)² + (38.77-43.969)² + (42.18-43.969)² + (26.72-43.969)² + (50.77-43.969)² + (38.9-43.969)² + (50.06-43.969)² ] / ((8 - 1)

Standard deviation = 12.341

The answer is D because a theorem is a general proposition proved by a a chain of reasoning

**Answer:**

Question 1: b Question 2: yes

**Step-by-step explanation:**

The variable must go with 7+1/3 calculate time for all the levels. Then add 5+1/6. It must be less than or equal to because you want to play all 6 levels. You can play all 6 when you plug in 6 as the variable. It is less than 60

Do the order of operations after you plug everything in. If that doesn't help do a proof.

6x-y turns into 6(-3)-2. Do parenthesis () first, (-18)-2. You will get the finally answer of -20.