Answer:
e = 6
Step-by-step explanation:
Step 1: Write equation
-2(8 - e) = 2 - e
Step 2: Solve for <em>e</em>
- Distribute -2: -16 + 2e = 2 - e
- Add e to both sides: -16 + 3e = 2
- Add 16 to both sides: 3e = 18
- Divide both sides by 3: e = 6
Step 3: Check
<em>Plug in e to verify it's a solution.</em>
-2(8 - 6) = 2 - 6
-2(2) = -4
-4 = -4
We have been given that the standard deviation of a group of 20 scores is 15 and we are asked to find variance.
Since we know variance is square of standard deviation. In order to find out the variance of the given data we have to take the square of 15.
Therefore, our variance is 225.
Maybe B (not sure).................
First is solve the total volume of punch they made. but convert first the 5 L to ml.
for every 1 L there 1000 ml, 5 L ( 1000 ml / 1 L ) = 5000 ml of punch
V = 5000 ml + 750 ml
V = 5750 ml
then number of 180 ml serving
n = 5750 / 180 = 31.94 or about 31 servings of 180 ml was made.
the punch left over
v = 5750 - 180( 31) = 170 ml of the punch is left
Answer:
the first one is the correct answer
Step-by-step explanation:
Try using a graphing calculator for some of these types of questions, it's very helpful
