I just did this, the answer is 12 :) hope that helps!
Answer:
17
Step-by-step explanation:
Variance=(standard deviation)^2
√289=standard deviation
Standard deviation=17
Answer:
-3 + 8a
Step-by-step explanation:
multiply 3 by -1 as well as -8a by -1 and you'll get -3 + 8a
Answer:

Step-by-step explanation:
1) Simplify


2) Use this formula: a/b × c/d = ac/bd.

3) Simplify.

4)

5) Since 2 × 2 = 4, the square root of 4 is 2.

6) Simplify 32 × 2 to 64.

7) Simplify 64/2 to 32.

<em><u>Therefor</u></em><em><u>,</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>o</u></em><em><u>p</u></em><em><u>t</u></em><em><u>i</u></em><em><u>o</u></em><em><u>n</u></em><em><u> </u></em><em><u>t</u></em><em><u>h</u></em><em><u>r</u></em><em><u>e</u></em><em><u>e</u></em><em><u> </u></em><em><u>-32</u></em>