Well it depends on how long after you wait the 8 minutes And there is no table to use if you can give me the table i will help you.
Answer:
D
Step-by-step explanation:
only solution C and D are linear function, and they are essentially straight lines. However, C have a x intercept of 5/2, so we rule out option C.
You just do
3x=x+4
subtract x from both sides
2x=4
divide 2 from both sides
x=2
y=2+4
y=6
(x,y)= (2,6)
Answer:
The 98% confidence interval would be given by (55.639;62.361)
Step-by-step explanation:
Information given
represent the sample mean
represent the sample deviation
represent the sample size
Solution to the problem
The confidence interval for the mean is given by the following formula:
(1)
The degrees of freedom are given by:
The Confidence is 0.98 or 98%, the significance would be 
and 
,and the critical value would be 
And replacing we got:
The 98% confidence interval would be given by (55.639;62.361)
Answer:
x=8.499
y=0.167
Step-by-step explanation:
the equation says:x^2-9y^2=72....(1)
x+3y=9.......(2)
divide (2) from (1),it becomes:
x-3y=8
making x subject of formula,
x=8+3y....(3)
submitting (3) into (1),it becomes
(8+3y)^2-9y^2=72
64+48y=72
48y=72-64=8
y=8/48=0.167......(4)
submitting (4) into (2),it becomes
x+3(0.167)=9
x+0.501=9
x=9-0.501
x=8.499
