Answer: B
Step-by-step explanation:
North and North and South and South can't connect.
To have a magnetic effect North and South have to connect.
B has north and south together, so that is the correct answer
Answer:
A:(6,-2.5)
Step-by-step explanation:
Hopefully this helps!
Answer:
We want a confidence of 99% so then the significance level would be 1%
The degrees of freedom are given by:
And the critical value using the significance level and and the critical value would be:
Step-by-step explanation:
We know the following info :
represent the standard deviation from the sample
represent the sample size selected
We want a confidence of 99% so then the significance level would be 1%
The degrees of freedom are given by:
And the critical value using the significance level and and the critical value would be:
Let us denote Maggie's years (her age) with M and her brother's with B.
We know that:
<span>Maggie's brother is 5 years younger than twice her age. So, we can write the equation:
B=2*M-5 (1)
We also know that t</span><span>he sum of their ages is 28, so we can write:
M+B=28 (2)
M=28-B (3)
Let put in equation (3) equation (1):
M=28-(2M-5)
M=28-2M+5
3M=33
M=11 Maggie is 11 years old.
B=28-11=17 Her brother is 17 years old.</span>