Answer:
Step-by-step explanation:
Total amount of Money saved by Manny is $150. He wants to buy a digital player with it.
The digital music player costs $89, and each song costs $0.99. Let x represent the number of songs that he can afford. This means that the cost of x songs would be
89 + 0.99x
If Manny spends no more than $150, before tax, the number of songs that he can buy will be
89 + 0.99x = 150
0.99x = 150 - 89 = 61
x = 61/0.99 = 61.6
He can buy 61 songs
Answer:

Step-by-step explanation:
For this case we have a linear model given by:

Where X= represent the height.
Y= represent the beats per minute
And the slope is given by
and the intercept 
We have the mean for x and y given also

And in order to find the best predicted value we just need to replace the value of X= 65, and we got this:

If we want a confidence interval for the response variable when the predictor variable is x, is given by this formula:

And if we replace we got this:

But for this case since we don't have the deviation we can just express it like this.
Answer:
a = 1
Step-by-step explanation:
First, you subtract 6 from both sides and you end up with a² = 1. Since one cannot be squared or square rooted, a = 1. I hope this helps!
Answer
The answer and procedures of the exercise are attached in the following archives.
Explanation
You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.