Answer: x= 5 and y= -2 or (5,-2)
Step-by-step explanation:
Answer:
Step-by-step explanation:
we know that the total time of the show is 30 minutes.
commercial part = 3x+2
entertainment part = y
also we know that y = 3x +2
y + 3x+2 = 30
we can also say that
2(3(x) +2) = 30
so then
6x +4 = 30
6x = 26
x = 4
4
is the time in minutes for commercials
Step-by-step explanation:
F(x) = 1/9 - 9
= (1-81)/9
=-80/9
...............................
Plzz mark it as a brilliant answer
Answer: 1.9166
Step-by-step explanation:
Let
be the population mean.
By considering the given description, we have

n=20

s=7
Since, the population standard deviation is unknown , so we use t-test.
Test statistic : 
i.e . 
[Rounded to four decimal places.]
Hence, the value of the t-test statistic : 1.9166