Answer:
The cost of one bag of diapers is $11 and the cost of one can of formula is $13
Step-by-step explanation:
Let
x -----> the cost of one bag of diapers
y ----> the cost of one can of formula
we know that
-----> equation A
----> equation B
Solve the system by graphing
Remember that the solution of the system is the intersection point both graphs
The solution is the point (11,13)
see the attached figure
therefore
The cost of one bag of diapers is $11 and the cost of one can of formula is $13
Answer:
Step-by-step explanation:
Refer to the attached figure. Note that the solution set is shaded, and includes all points on the solid boundary line.
black point (-1,1) is outside of the solution set
Red point (1,-1) is also outside of the solution set.
Yellow point (3,2) is on the solid boundary line, so it is part of the solution set
Blue point (2,3) is outside of the solution set.
Given Equations
- 5x+3y=8--(1)
- 4x+7y=34--(2)
Let it has solution (x,y)
Add both
![\\ \sf\longmapsto 5x+4x+3y+7y=8+34](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%5Clongmapsto%205x%2B4x%2B3y%2B7y%3D8%2B34)
![\\ \sf\longmapsto 9x+10y=42](https://tex.z-dn.net/?f=%5C%5C%20%5Csf%5Clongmapsto%209x%2B10y%3D42)
It will also have same solution (x,y)
Answer:
The answer is in the explanation
Step-by-step explanation:
Mean value =
= 438
(a) The data appeared to be centered towards 438.
There are little or no skew.
There is no outliers.
(b) yes
(c) standard deviation = s = 14.8955
95% confidence interval = ![+- t_{df} * s\sqrt{n}](https://tex.z-dn.net/?f=%2B-%20t_%7Bdf%7D%20%20%2A%20s%5Csqrt%7Bn%7D)
=
= (430.3415, 445.6585)
(d) Test statistic
t = ![(438 - 450)/{14.8955\sqrt17} }](https://tex.z-dn.net/?f=%28438%20-%20450%29%2F%7B14.8955%5Csqrt17%7D%20%7D)
t = -3.3216
p -value is correctly given in option b.
No, 450 is not a plausible valaue.