Answer:
3,18
Step-by-step explanation:
x+6=21
7x=21
21/7x=3
Other 6x=6(3)
6x=18
The numbers=3,18
Hope this helps xx
Given:





To find:
The variance. of combined set.
Solution:
Formula for variance is
...(i)
Using (i), we get




Similarly,




Now, after combining both sets, we get




Therefore, the variance of combined set is 15.4.
Answer:
x = x+9
Step-by-step explanation:
well that is the only way you can do it as we do not know about what x is. also, if you meant by x + (x*9), you can represent that as x*10
Answer:
Store A
Step-by-step explanation:
Store A costs $200.
Store B costs $240, with a 15% discount.
To solve how much the discount is, you do -

Since Store A is still cheaper, choose Store A.