Answer: 8
Step-by-step explanation:
The formula to find the t-test statistic for differences between in two population mean:-
,where = sample mean difference
SE= Sample error
Given : SE= 4 points
t-statistic = 2.00
Substitute theses values in the above formula , we get
Hence, the sample mean difference is
Answer:
<u>Use the following identity:</u>
- a³ + b³ + c³ = 3abc if a + b + c = 0
<u>Substitute:</u>
<u>and get:</u>
- (3x)³ + (5y)³ + (4z)³ = 3(3x)(5y)(4z)
- 27x³ + 125y³ + 64z³ = 180xyz
12 1/4= (12x4+1):4= 49/4 inches of rain
The number of hours is 2512
So we do the division to find out the <span>approximate rainfall rate in inches per hour:
49/4 : 2512= 0.0049 inches per hours
But I found you wrongly typed the hours 25 1/2= 51/2
If it is true we have </span>the <span>approximate rainfall rate in inches per hour:
49/4 : 51/2= 49/4 x 2/51= 0.48 inches per hour</span>
Answer:
hello : (x+3)² -2 = 0
Step-by-step explanation:
x²+12x+7=0
(x² +12x +9) -2 =0
(x+3)² -2 = 0....an equation equivalent