D. This sign (*) means division
Answer:
-5 = <em>v</em>
Step-by-step explanation:
First you take the positive five and subtract it from -20 making it -25. Then you divide -25 by positve 5 and you get -5 making your answer -5 = <em>v</em>
Ok so the amounts are x and 100-x
0.24x+0.5(100-x)=0.36(100)
solve
0.24x+50-0.5x=36
-0.26x+50=36
mminus 36 both sides
-0.26x=-14
divide both sides by -0.26
x=53.8462
find other one
100-x=100-53.8462=46.1538
53.8462 gallons of the 24%
46.1538 gallons of the 50%
Answer:
7.67
Step-by-step explanation:
Given the data :
Week_sales_Forecast ___|error|_ |error|²
1 _____15
2 ____ 16
3 ____ 19
4 ____ 18
5 ____ 19 ____ 17 _______ 2____4
6 ____ 20 ___ 18 ________2____4
7 ____ 19 ____19 ________0____0
8 ___ 22 ____ 19 ________3____9
9 ___ 15 ____ 20 ________5___ 25
10 __ 21 _____19 ________ 2 ___ 4
Mean squared error :
(4 + 4 + 0 + 9 + 25 + 4) / 6
= 46 / 6
= 7.666
= 7.67