1/10 of 400 is 40
$1,427-40= $1387
so Haley's account has 1387 dollars or less
Answer:
146 
Step-by-step explanation:
9x6/2 = 27
27x4 = 108
6x6 = 36
36+108 = 146
Answer:


And we are 95% confident that the true difference means are between 
Step-by-step explanation:
We know the following info:
sample mean for group 1
sample mean for group 2
sample standard deviation for group 1
sample standard deviation for group 2
sample size group 1
sample size group 2
We want to find a confidence interval for the difference of means and the correct formula to do this is:

Now we just need to find the critical value. The confidence level is 0.95 then the significance is
and
. The degrees of freedom are given by:

The critical value for this case would be :
And replacing into the confidence interval formula we got:


And we are 95% confident that the true difference means are between 
To add the probabilities, you would have to treat them like any other numbers. If they are decimals or percents, you can follow basic addition rules. If you are given the probabilities as fractions, make sure that you have common denominators when you add them.
Answer:
Option C
Step-by-step explanation:
we have

step 1
Group terms that contain the same variable, and move the constant to the opposite side of the equation

step 2
Factor -6 leading coefficient'

step 3
Complete the square
Remember to balance the equation by adding the same constants to each side


step 4
Rewrite as perfect squares

simplify
