The difference between each term is
-5, i.e. we know one of our terms is -5n. Now we just need to adjust it to get u1 correct. At n=1, -5n would give us -5 therefore we need to add 6 to get to 1. This gives us our equation:

Now we can work out the sum easily (we can use an equation using the above but personally I prefer the other one as it's less prone to mistakes):

We know n is 12, and we know u1 is 1, and we also know the difference is -5.
Substituting this in:
Answer:
A, C, and E good luck
Step-by-step explanation:
Answer:
The sample proportion is p = 0.04.
Step-by-step explanation:
The best point estimate for a 95% confidence interval for the true proportion of pills in the shipment that have failed to retain full potency is ...
Sample of 200 pills.
Eight have failed to retain their full potency.
So the sample proportion is:
Answer:
Stephen worked 50 hours that week
Step-by-step explanation:
17 * 50 = 850
850 - 25 = 825
So stephen worked 50 hours
Step 1: Distribute. On the right side, you should get =2x-4
Step 2: Add all common bases. You should get 4x-5 on the left side
Step 3: Add on each side. For example, add five to each side of the equation. Your equation should look like this; 4x= 2x+1
Step 4: Subtract each x number by 2x. Your equation should be; 2x=1
Step 5: Divide each side by two. Your answer should be x=1/2 or x=0.5
Hope this helped!