Answer:
C. 30
Step-by-step explanation:
-It is a statistical rule of thumb that the size of a sample must be
.
-This size is deemed adequate for the Central Limit Theorem to hold.
-At this size or greater, the shape of the resultant distribution is normal.
#It should however be noted, that for a normal distribution the CLT holds even for smaller sample sizes.
Answer:3(x-9) is expressed as 3x-27
Step-by-step explanation: 3(Xminus9)
3(X-9)
Use 3 to open the bracket by using 3 to multiply everything in the bracket.
Then you will get
3x-27
Answer:
800 pencils
Step-by-step explanation:
because if 5students brought in a set of 8 box's with ten in it you get 80 times 5 you get 400 then you add the ten students that brought in a set of 40 each which is another 400 so400 +400= 800
Answer:
Step-by-step explanation:
For the first one, revenue - cost = profit. We have equations for revenue and profit, so filling in:

Let's add cost to both sides to make it positive and bring everything on the right over to the left and combine like terms:

For the second one:
P(x)*T(x) = 
Distribute the 3x into everything inside the parenthesis to get

For the second part of that problem, C(x)*P(x) = 
Distribute the x into everything first to get:

The distribute the -4 into everything to get:

Combine the like terms and put everything together to get
